sesman: don't spit on the console when starting

As the Debian patch[1] expresses, spitting messages on the console when
a process starts in background is a bad idea. Everything should be
written to log file and daemon should start silently. This is a first
step to shut up daemons.

Got some idea from Debian Remote Maintainers and Thorsten Glaser,
thanks!

[1] https://salsa.debian.org/debian-remote-team/xrdp/blob/2751ad4d62b1f63dbc2e4b8fa1580fa54b0f5460/debian/patches/shutup-daemon.diff

sesman/sesman.c

@@ -209,8 +209,7 @@ main(int argc, char **argv)
 
     if (1 == argc)
     {
-        /* no options on command line. normal startup */
-        g_printf("starting sesman...\n");
+        /* start in daemon mode if no cli options */
         daemon = 1;
     }
     else if ((2 == argc) && ((0 == g_strcasecmp(argv[1], "--nodaemon")) ||
@@ -312,6 +311,12 @@ main(int argc, char **argv)
         g_exit(1);
     }
 
+    /* not to spit on the console, show config summary only when running in foreground */
+    if (!daemon)
+    {
+        config_dump(g_cfg);
+    }
+
     g_snprintf(cfg_file, 255, "%s/sesman.ini", XRDP_CFG_PATH);
 
     /* starting logging subsystem */