[setup] package re-/de-installation from CLI

[Achim Gratz]

Since the patch from February doesn't apply anymore, I've pulled the
patch up to apply to the current CVS head:

http://repo.or.cz/w/cygwin-setup.git/patch/858289a3ebe90989e3eca123018aff84ad5f2d50

I've not split the patch into three parts, let me know if you prefer me
to do that again.


Remark:

The short option names would be somewhat easier to memorize if I could
use -p instead of -X:

-p / -P: remove / install packages
-c / -C: remove / install category

but then the -p/--proxy-url short option would need to be renamed (-x?).


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

SD adaptations for KORG EX-800 and Poly-800MkII V0.9:
http://Synth.Stromeko.net/Downloads.html#KorgSDada