Avoid Consuming Command Line Options

[R0b0t1 <r030t1 gmail com>]

Hello,

I have a library which does its own command line parsing. I want to
keep GTK from consuming argv and aborting on unknown options.

I have attempted to do gtk_parse_args(NULL, NULL) or gtk_init(NULL,
NULL) to no avail.

I've not successfully installed a custom command line handler, but it
seems like the options are still parsed in some way. This is not
acceptable, the library uses a custom syntax (it's FreeRDP, which uses
Windows' style for consistency).

Cheers,
    R0b0t1