pidgin/pidgin

Update the date in COPYRIGHT as it was a few years behind
release-2.x.y
2 months ago, Gary Kramlich
21a56db5f998
Update the date in COPYRIGHT as it was a few years behind

Testing Done:
None

Reviewed at https://reviews.imfreedom.org/r/3007/
EXTRA_DIST = Makefile.mingw
DIST_SUBDIRS = bonjour gg irc jabber novell null sametime silc silc10 simple zephyr
SUBDIRS = $(DYNAMIC_PRPLS) $(STATIC_PRPLS)