mgcp: make sure all command line options are documented

Signed-off-by: Holger Hans Peter Freyther <zecke@selfish.org>
diff --git a/openbsc/src/osmo-bsc_mgcp/mgcp_main.c b/openbsc/src/osmo-bsc_mgcp/mgcp_main.c
index 3bacbe6..f73e73d 100644
--- a/openbsc/src/osmo-bsc_mgcp/mgcp_main.c
+++ b/openbsc/src/osmo-bsc_mgcp/mgcp_main.c
@@ -80,6 +80,8 @@
 	printf("Some useful help...\n");
 	printf(" -h --help is printing this text.\n");
 	printf(" -c --config-file filename The config file to use.\n");
+	printf(" -D --daemonize Fork the process into a background daemon\n");
+	printf(" -V --version Print the version number\n");
 }
 
 static void handle_options(int argc, char **argv)