[Mageia-dev] Freeze push: xscreensaver

[David Walser]

This updates to 5.21.  Just minor changes in this version, probably the most important of which is the first:

- Changed default text source from Twitter to Wikipedia, since Twitter now requires a login to get any feeds.
- New version of fireworkx.
- Minor fixes to distort, fontglide, xmatrix.
- New MacOS crash in bsod.
- New mode in lcdscrub.

I tested it in Cauldron and verified that it works fine, including all of the screensavers mentioned above (except xmatrix which we have disabled).