[RFC] icedtea-web (netx): Allow applet to read jnlp file for parameters

[Andrew Su]

Hi,

This patch lets the applet read parameters stored in a jnlp file pointed to by the parameter "jnlp_href". Currently, when the applet loads given the parameter jnlp_href will not read the file, jnlp_file will be like any normal parameter passed in to an applet. 

I originally planned on placing it inside parse of PluginAppletViewer, but later decided that jnlp stuff should go back into netx. Thanks to Omair's patch which gave me the idea to place it inside PluginBridge (in netx). 

Comments? Questions? Concerns?

Cheers,
--Andrew