[Gnash] plugin update

[Rob Savoye]

I've made a few more changes to the plugin, although they're only of use 
to other developers. I implemented processing the arguments passed in 
when the new data stream is created by Firefox, and add a special one. 
If you pass "debug=waitforgdb", firefox will print out the PID of the 
thread, and block waiting for you to attach GDB. This is the easiest way 
I've found to debug the plugin itself, because by this time the plugin 
is loaded, and all issues with shared libraries go away. I was getting 
tired of having to just printf things...

Anyway, this one still draws the boring OpenGL triangle and square by 
default. For the brave at heart, you can go to plugin.cpp:561 and flip 
the #ifdef to watch the plugin launch, and then play the movie. (sort 
of...) At this time I'm still getting weird issues with OpenGL and 
threading, but that's the next focus of debugging...

With the plugin set to download all the flash movies to /tmp that it 
comes across, I think mortgage company ads have the highest amount, 
followed by realtors.

        - rob -