FS-7669 #resolve There was already a postinst file, and I missed it.

debian/freeswitch.postinst

@@ -29,6 +29,10 @@ case "$1" in
       fi
       chown freeswitch $x
     done
+    if [ ! -d "/etc/freeswitch" ]; then
+	mkdir -p /etc/freeswitch/
+	cp -a /usr/share/freeswitch/conf/vanilla/* /etc/freeswitch/
+    fi
     ;;
   abort-upgrade|abort-remove|abort-deconfigure)
     ;;