pidgin/pidgin

Finally add XMPP Message Carbons XEP-0280

2020-11-10, Gary Kramlich
e32ab786a04f
Finally add XMPP Message Carbons XEP-0280

Initial XMPP message carbons support. Most of the credit goes to Koosha Khajehmoogahi as I pulled most of this from their GSOC 2015 branch.

Testing Done:
Ran side by side with pidgin2 and messaged a separate XMPP account from pidgin2, pidgin3, and conversations on my phone.

Reviewed at https://reviews.imfreedom.org/r/204/
if ENABLE_DOC
subdir('reference')
endif
if ENABLE_GTK
pidgin_man = configure_file(
input : 'pidgin3.1.in',
output : 'pidgin3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif
if enable_consoleui
finch_man = configure_file(
input : 'finch3.1.in',
output : 'finch3.1',
configuration : man_conf,
install : true,
install_dir : get_option('mandir') / 'man1')
endif