pidgin/pidgin

Remove includes from protocol.h that weren't used there and deal with the fallout

2021-04-30, Gary Kramlich
e3397381fd35
Remove includes from protocol.h that weren't used there and deal with the fallout

Testing Done:
Compiled and ran locally. Connected with bonjour, xmpp, and irc.

Reviewed at https://reviews.imfreedom.org/r/635/
libpurple/data/purple-url-handler.desktop.in
libpurple/protocols/null/nullprpl.c
pidgin/data/im.pidgin.Pidgin.desktop.in
sub/libpurple/data/purple-url-handler.desktop.in
sub/libpurple/protocols/null/nullprpl.c
sub/pidgin/data/im.pidgin.Pidgin.desktop.in