pidgin/pidgin

Update our mozilla.pem file and document how to do so.
release-2.x.y
2021-06-03, Gary Kramlich
d235516f2d9c
Update our mozilla.pem file and document how to do so.

Also update mk-ca-bundle.pl as the version we had was very old.

Testing Done:
Verified bundles updated and clean works.

Bugs closed: PIDGIN-17535

Reviewed at https://reviews.imfreedom.org/r/722/
/** @page imgstore-signals Image Store Signals
@signals
@signal image-deleting
@endsignals
@see imgstore.h
<hr>
@signaldef image-deleting
@signalproto
char *(*image_deleting)(const PurpleStoredImage *img);
@endsignalproto
@signaldesc
Emitted when a #PurpleStoredImage is about to be destroyed. This allows
for what amounts to weak references. Code can hold onto a pointer to
the PurpleStoredImage without actually "holding" a reference. They can
then use a signal handler to let them know when their img is about to
be destroyed.
@param img The image about to be destroyed.
@note It's not possible to purple_imgstore_ref() img to save it.
@endsignaldef
*/
// vim: syntax=c.doxygen tw=75 et