fs_cli: make enhanced fs_cli features work on all TERMs

FS-3815 --resolve

This is a workaround for the fact that libedit counts terminal control
characters when calculating the length of the prompt.  By not using
absolute positioning, we avoid the issue.

Thanks to Ivan Isaev for the workaround and testing.

libs/esl/fs_cli.c

@@ -1123,7 +1123,6 @@ int main(int argc, char *argv[])
 	char dft_cfile[512] = "fs_cli.conf";
 #endif
 	char *home = getenv("HOME");
-	char *term = getenv("TERM");
 	/* Vars for optargs */
 	int opt;
 	static struct option options[] = {
@@ -1158,15 +1157,11 @@ int main(int argc, char *argv[])
 	int argv_quiet = 0;
 	int loops = 2, reconnect = 0, timeout = 0;
 
-	if (term && (!strncasecmp("screen", term, 6) ||
-		!strncasecmp("vt100", term, 5))) {
-		feature_level = 1;
-	} else {
-		feature_level = 0;
-	}
 
 #ifdef WIN32
 	feature_level = 0;
+#else
+	feature_level = 1;
 #endif
 
 	strncpy(internal_profile.host, "127.0.0.1", sizeof(internal_profile.host));

libs/libedit/src/term.c

@@ -609,10 +609,15 @@ mc_again:
 	}
 	del = where - el->el_cursor.h;
 
+#if 0
+	/* workaround miscounting of control characters in prompt by
+	   avoiding absolute horizontal positioning */
 	if ((del < -4 || del > 4) && GoodStr(T_ch))
 		/* go there directly */
 		(void) tputs(tgoto(Str(T_ch), where, where), where, term__putc);
-	else {
+	else
+#endif
+	  {
 		if (del > 0) {	/* moving forward */
 			if ((del > 4) && GoodStr(T_RI))
 				(void) tputs(tgoto(Str(T_RI), del, del),