PPM: Mageia pkgs, bug fixes

I have enhanced the EXE, DEV, DOC, NLS checkboxes in the Puppy Package Manager (PPM) to recognise Mageia package naming.

I took out some common code to new script /usr/local/petget/postfilterpkgs.sh.

I discovered a few bugs that were introduced in recent changes to the PPM, one causes the Configure window to crash.

Woof commit:
http://bkhome.org/fossil/woof2.cgi/info/f6f14d019b

Tags: woof