Adds a PACKAGECONFIG option to use libsoup2 instead of libsoup3.
Including libsoup2 and libsoup3 in the same process can cause strange
runtime failures, and the latest release of each major version will
cause the process to exit if both are detected on startup.
The default is changed from libsoup3 back to libsoup2. Most GNOME
packages are still using libsoup2, and a large number of these pull in
webkitgtk either directly or indirectly. If webkitgtk uses libsoup3,
this causes all of these packages to fail at startup. It appears that
most GNOME packages will have to switch to libsoup3 when they transition
to GTK4.
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
