Add minimal configuration for configuring FreeSWITCH from scratch

The default "vanilla" configuration that comes with FreeSWITCH has
been designed as a showcase of the configurability of the myriad of
features that FreeSWITCH comes with out of the box. While it is very
helpful in tinkering with FreeSWITCH, it has a lot of extraneous stuff
enabled/configured for use in a production system. This configuration
aims to take the reverse stance -- it attempts to be a starting point
for configuring a new system by "adding" required features (instead of
removing them as one would do if one starts with the default
configuration).

Jira: FS-7362
Source: 270941d6f2

conf/minimal/README.md

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+## Minimal FreeSWITCH Configuration
+
+The default "vanilla" configuration that comes with FreeSWITCH has
+been designed as a showcase of the configurability of the myriad of
+features that FreeSWITCH comes with out of the box. While it is very
+helpful in tinkering with FreeSWITCH, it has a lot of extraneous stuff
+enabled/configured for use in a production system. This configuration
+aims to take the reverse stance -- it attempts to be a starting point
+for configuring a new system by "adding" required features (instead of
+removing them as one would do if one starts with the default
+configuration).
+
+This folder also includes the corresponding `modules.conf` that lists
+the modules that are required to get this configuration working.
+
+### Test
+
+This configuration was tested by sending an INVITE (without
+registration) using the `siprtp` example program that comes with
+PJSIP, and verifying that the info dump is produced on the FreeSWITCH
+console.
+
+    $ ./siprtp -q -p 1234 "sip:stub@$(my_ip):5080"
+
+### Upstream
+
+The configuration in this folder comes from
+[mx4492/freeswitch-minimal-conf](https://github.com/mx4492/freeswitch-minimal-conf/commit/270941d6f2dca279f1bb8762d072940273d5ae11).
+
+### Other Minimal Configurations
+
+* [voxserv/freeswitch_conf_minimal](https://github.com/voxserv/freeswitch_conf_minimal)

conf/minimal/autoload_configs/acl.conf.xml

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+<configuration name="acl.conf" description="Network Lists">
+  <network-lists>
+    <!--
+         These ACL's are automatically created on startup.
+
+         rfc1918.auto  - RFC1918 Space
+         nat.auto      - RFC1918 Excluding your local lan.
+         localnet.auto - ACL for your local lan.
+         loopback.auto - ACL for your local lan.
+    -->
+
+    <list name="domains" default="deny">
+    </list>
+  </network-lists>
+</configuration>

conf/minimal/autoload_configs/cdr_csv.conf.xml

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+<configuration name="cdr_csv.conf" description="CDR CSV Format">
+  <settings>
+    <param name="default-template" value="example"/>
+    <param name="rotate-on-hup" value="true"/>
+    <param name="legs" value="ab"/>
+  </settings>
+
+  <templates>
+    <template name="example">"${caller_id_name}","${caller_id_number}","${destination_number}","${context}","${start_stamp}","${answer_stamp}","${end_stamp}","${duration}","${billsec}","${hangup_cause}","${uuid}","${bleg_uuid}","${accountcode}","${read_codec}","${write_codec}"</template>
+  </templates>
+</configuration>

conf/minimal/autoload_configs/conference.conf.xml

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+<configuration name="conference.conf" description="Audio Conference">
+  <profiles>
+    <profile name="default"/>
+  </profiles>
+</configuration>

conf/minimal/autoload_configs/console.conf.xml

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+<configuration name="console.conf" description="Console Logger">
+  <mappings>
+    <map name="all" value="console,debug,info,notice,warning,err,crit,alert"/>
+  </mappings>
+
+  <settings>
+    <param name="colorize" value="true"/>
+    <param name="loglevel" value="debug"/>
+  </settings>
+</configuration>

conf/minimal/autoload_configs/db.conf.xml

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+<configuration name="db.conf" description="LIMIT DB Configuration">
+  <settings/>
+</configuration>

conf/minimal/autoload_configs/event_socket.conf.xml

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+<configuration name="event_socket.conf" description="Socket Client">
+  <settings>
+    <param name="nat-map" value="false"/>
+    <param name="listen-ip" value="127.0.0.1"/>
+    <param name="listen-port" value="8021"/>
+    <param name="password" value="ClueCon"/>
+  </settings>
+</configuration>

conf/minimal/autoload_configs/logfile.conf.xml

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+<configuration name="logfile.conf" description="File Logging">
+  <settings>
+    <param name="rotate-on-hup" value="true"/>
+  </settings>
+
+  <profiles>
+    <profile name="default">
+      <settings>
+        <!-- At this length in bytes rotate the log file (0 for never) -->
+        <param name="rollover" value="10485760"/>
+      </settings>
+
+      <mappings>
+        <!--
+            name can be a file name, function name or 'all'
+            value is one or more of debug,info,notice,warning,err,crit,alert,all
+        -->
+        <map name="all" value="debug,info,notice,warning,err,crit,alert"/>
+      </mappings>
+    </profile>
+  </profiles>
+</configuration>

conf/minimal/autoload_configs/modules.conf.xml

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+<configuration name="modules.conf" description="Modules">
+  <modules>
+
+    <!-- Loggers (I'd load these first) -->
+    <load module="mod_console"/>
+    <load module="mod_logfile"/>
+
+    <!-- XML Interfaces -->
+    <load module="mod_xml_rpc"/>
+
+    <!-- Event Handlers -->
+    <load module="mod_cdr_csv"/>
+    <load module="mod_event_socket"/>
+
+    <!-- Endpoints -->
+    <load module="mod_sofia"/>
+    <load module="mod_loopback"/>
+
+    <!-- Applications -->
+    <load module="mod_commands"/>
+    <load module="mod_conference"/>
+    <load module="mod_db"/>
+    <load module="mod_dptools"/>
+    <load module="mod_expr"/>
+    <load module="mod_hash"/>
+    <load module="mod_esf"/>
+
+    <!-- Dialplan Interfaces -->
+    <load module="mod_dialplan_xml"/>
+
+    <!-- Codec Interfaces -->
+
+    <!-- File Format Interfaces -->
+    <load module="mod_sndfile"/>
+    <load module="mod_native_file"/>
+
+    <!-- Third party modules -->
+
+  </modules>
+</configuration>

conf/minimal/autoload_configs/sofia.conf.xml

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+<configuration name="sofia.conf" description="sofia Endpoint">
+  <global_settings>
+    <param name="log-level" value="0"/>
+    <param name="tracelevel" value="DEBUG"/>
+  </global_settings>
+
+  <profiles>
+    <X-PRE-PROCESS cmd="include" data="../sip_profiles/*.xml"/>
+  </profiles>
+</configuration>

conf/minimal/autoload_configs/switch.conf.xml

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+<configuration name="switch.conf" description="Core Configuration">
+  <settings>
+    <param name="colorize-console" value="true"/>
+
+    <!-- Max number of sessions to allow at any given time -->
+    <param name="max-sessions" value="1000"/>
+    <!--Most channels to create per second -->
+    <param name="sessions-per-second" value="30"/>
+
+    <!-- Default Global Log Level - value is one of debug,info,notice,warning,err,crit,alert -->
+    <param name="loglevel" value="debug"/>
+
+    <!-- RTP port range -->
+    <param name="rtp-start-port" value="16384"/>
+    <param name="rtp-end-port" value="32768"/>
+  </settings>
+</configuration>

conf/minimal/autoload_configs/xml_rpc.conf.xml

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+<configuration name="xml_rpc.conf" description="XML RPC">
+  <settings>
+    <!-- The port where you want to run the http service (default 8080) -->
+    <param name="http-port" value="8080"/>
+    <!-- if all 3 of the following params exist all http traffic will require auth -->
+    <param name="auth-realm" value="freeswitch"/>
+    <param name="auth-user" value="freeswitch"/>
+    <param name="auth-pass" value="$${xml_rpc_password}"/>
+
+    <param name="commands-to-log" value=".*"/>
+  </settings>
+</configuration>

conf/minimal/dialplan/default.xml

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+<include>
+  <context name="default">
+
+    <extension name="sample">
+      <condition>
+        <action application="info"/>
+      </condition>
+    </extension>
+
+  </context>
+</include>

conf/minimal/dialplan/public.xml

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+<include>
+  <context name="public">
+    <X-PRE-PROCESS cmd="include" data="public/*.xml"/>
+  </context>
+</include>

conf/minimal/dialplan/public/00_stub.xml

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+<include>
+  <extension name="sample">
+    <condition>
+      <action application="info"/>
+    </condition>
+  </extension>
+</include>

conf/minimal/freeswitch.xml

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+<?xml version="1.0"?>
+<document type="freeswitch/xml">
+  <X-PRE-PROCESS cmd="include" data="vars.xml"/>
+
+  <section name="configuration" description="Various Configuration">
+    <X-PRE-PROCESS cmd="include" data="autoload_configs/*.xml"/>
+  </section>
+
+  <section name="dialplan" description="Regex/XML Dialplan">
+    <X-PRE-PROCESS cmd="include" data="dialplan/*.xml"/>
+  </section>
+</document>

conf/minimal/modules.conf

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+applications/mod_commands
+applications/mod_conference
+applications/mod_db
+applications/mod_dptools
+applications/mod_esf
+applications/mod_expr
+applications/mod_hash
+dialplans/mod_dialplan_xml
+endpoints/mod_loopback
+endpoints/mod_sofia
+event_handlers/mod_cdr_csv
+event_handlers/mod_event_socket
+formats/mod_native_file
+formats/mod_sndfile
+loggers/mod_console
+loggers/mod_logfile
+xml_int/mod_xml_rpc

conf/minimal/sip_profiles/external.xml

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+<profile name="external">
+  <gateways>
+    <X-PRE-PROCESS cmd="include" data="external/*.xml"/>
+  </gateways>
+
+  <settings>
+    <param name="auth-calls" value="false"/>
+
+    <param name="debug" value="0"/>
+
+    <param name="dialplan" value="XML"/>
+    <param name="context" value="public"/>
+    <param name="codec-prefs" value="$${global_codec_prefs}"/>
+
+    <param name="rtp-ip" value="$${local_ip_v4}"/>
+    <param name="sip-ip" value="$${local_ip_v4}"/>
+    <param name="ext-rtp-ip" value="auto-nat"/>
+    <param name="ext-sip-ip" value="auto-nat"/>
+    <param name="sip-port" value="$${external_sip_port}"/>
+  </settings>
+</profile>

conf/minimal/sip_profiles/external/stub.xml

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+<include>
+ <!--  <gateway name="itsp-name"> -->
+ <!--    <param name="proxy" value="1.2.3.4"/> -->
+ <!--    <param name="register" value="false"/> -->
+ <!-- </gateway> -->
+</include>

conf/minimal/sip_profiles/internal.xml

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+<profile name="internal">
+  <settings>
+    <param name="auth-calls" value="true"/>
+    <param name="apply-nat-acl" value="nat.auto"/>
+
+    <param name="debug" value="0"/>
+    <param name="sip-trace" value="yes"/>
+
+    <param name="dialplan" value="XML"/>
+    <param name="context" value="default"/>
+    <param name="codec-prefs" value="$${global_codec_prefs}"/>
+
+    <param name="rtp-ip" value="$${local_ip_v4}"/>
+    <param name="sip-ip" value="$${local_ip_v4}"/>
+    <param name="ext-rtp-ip" value="auto-nat"/>
+    <param name="ext-sip-ip" value="auto-nat"/>
+    <param name="sip-port" value="$${internal_sip_port}"/>
+  </settings>
+</profile>

conf/minimal/vars.xml

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+<include>
+  <X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMU,PCMA"/>
+
+  <!-- NOTE: CHANGE THIS BEFORE USE -->
+  <X-PRE-PROCESS cmd="set" data="xml_rpc_password=worksnot"/>
+
+  <X-PRE-PROCESS cmd="set" data="internal_sip_port=5060"/>
+  <X-PRE-PROCESS cmd="set" data="external_sip_port=5080"/>
+</include>