pidgin/pidgin

Merge release-2.x.y branch into main, with manual merges in
ChangeLog (easy)
Makefile.mingw (easy)
configure.ac (easy)
irc/msgs.c (not too bad)

And some Windows build files. We should make sure the pango used by 3.0.0
doesn't have the crash bug from CVE-2013-6486.
#ifndef _PURPLE_CLIENT_H_INCLUDED_
#define _PURPLE_CLIENT_H_INCLUDED_
#include <glib.h>
#include <glib-object.h>
#include "purple-client-bindings.h"
G_BEGIN_DECLS
void purple_init(void);
G_END_DECLS
#endif