manpage and usage output: add -irlimit

nx-X11/programs/Xserver/hw/nxagent/Args.c

@@ -2135,6 +2135,7 @@ void ddxUseMsg(void)
   ErrorF("-nokbreset             don't reset keyboard device if the session is resumed\n");
   ErrorF("-noxkblock             always allow applications to change layout through XKEYBOARD\n");
   ErrorF("-autograb              enable autograb\n");
+  ErrorF("-irlimit               maximum image data rate to the encoder input in kB/s.\n");
   ErrorF("-tile WxH              maximum size of image tiles (minimum allowed: 32x32)\n");
   ErrorF("-keystrokefile file    file with keyboard shortcut definitions\n");
   ErrorF("-verbose               print more warning and error messages\n");

nx-X11/programs/Xserver/hw/nxagent/man/nxagent.1

@@ -539,6 +539,9 @@ allowed to change the keyboard settings through XKEYBOARD.
 maximum size of the tile used when sending an image to the remote
 display (minimum allowed: 32x32; no default)
 .TP 8
+.B \-irlimit
+maximum image data rate to the encoder input in kB/s. The default is no limit.
+.TP 8
 .B \-D
 enable desktop mode (default)
 .TP 8