added documentation entry for OpenGL commandline options

Documentation/DeveloperHelpSources/options.docu

@@ -10,6 +10,12 @@
  * --no-splash   : Disable splash screen\n
  * --disable-stereo  : Disable Stereo Mode\n
  *
+ * OpenGL Options:\n
+ * -profile < compat | core >   : request Compatibility or %Core context ( Default = %Core )\n
+ * -glVersion <int.int>           : request specified OpenGL version (Default = 3.2)\n
+ * -samples <int>               : request MSAA with <int> samples (Default = 16)\n
+ * \note The OpenGL command line parameters override stored settings temporarily. To permanently store an OpenGL setting, use the options dialog.
+ *
  * Log options:\n
  * --log-to-console ( -c )        : Write logger window contents to console\n
  * \note On Window Systems, using the --log-to-console option causes the creation of a console if OpenFlipper was started without one.