[PATCH cygport] xorg.cygclass: Allow configuration of default SRC_URI compression

[Jon Turney]

On 12/04/2022 01:41, Yaakov Selkowitz wrote:
> On Mon, 2022-04-11 at 13:58 +0100, Jon Turney wrote:
>> Historically, xorg packages were usually provided as .gz and .bz2
>> compressed tarballs.  The current trend is to no longer provide .bz2,
>> but .gz and .xz instead.  Allow the compression to be configured, with a
>> backwards compatible default.
> 
> If all or even most current packages use .xz, then maybe just default to that
> and define XORG_SRC_COMPRESSION for the (current) exceptions?

Yeah, I went back and forth on what the default should be here.

It's only most packages, since it relies on someone remembering to 
change the compressions in AM_INIT_AUTOMAKE, which sometimes hasn't 
happened.

Changing the default changes the meaning of old .cygport files in a way 
that probably breaks them.