Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1044237

This is a backport of an existing fix on master.

https://bugzilla.gnome.org/show_bug.cgi?id=711613

Colin Walters authored Nov 03, 2013 and Richard Hughes committed Nov 25, 2013

Side note: an OSTree-like rigorous coding style where ret = FALSE
always at the start of a function would make this error setting errors
not happen.

https://bugzilla.gnome.org/show_bug.cgi?id=711368

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1025250

This worked before if the unknown tag was in the root <application> but fails
if it appears anywhere like <screenshots> or <keywords>

It takes 226ms to get the history of 849 packages, which is slightly above the
current timeout value. Increase this to something much larger, and additionally
do not fail the refine if the method takes longer than this. The history data is
supplemental afterall and not explicitly required.

This allows us to specify webapps exactly from the command line, and also helps
with applications with names like like '0ad'.

This is a spec extension that will be used by font add-ons soon.

In this case, set a cache age of 'we don't care'.

Resolves: https://bugzilla.gnome.org/show_bug.cgi?id=710117