pidgin/pidgin

fix some issues that were identified while working on a flatpak build

Fix some issues that were discovered while working on a flatpak

Testing Done:
built a flatpak (that'll be a separate review request) and ran into some issues..

First was bonjour_ft wouldn't build, not sure how/why that isn't happening elsewhere.. but whatever..

Next was the network monitor stuff I moved us to way back in december of 2015 works, but under flatpak the network is initially unavailable but then becomes available. A bunch of our code was __only__ checking network availability at startup and then not listening for changes later. This code is really gross right now, but a lot of it is going to need some major refactoring where as this effort was just to get this going right now.

Reviewed at https://reviews.imfreedom.org/r/66/
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