Add support for RSS feeds from nzbmatrix.com.
This site requires a username and password to get to the NZB files.
So similar support as for newzbin has to be added.
User "ultimatejones" provided a working prototype that needs more efficient integration in SABnzbd.
Sources attached.
The implementation should be integrated with the existing newzbin/url-grabber support. The patch contains too much duplicated code. Also, a seperate screen for the nzbmatrix credentials is overdone, just add an extra box to the newzbin box.
Consider renaming the newzbin tab to "Indexing sites".