Avoid redundant invocations of init_extension_functions for IOCP
update the 2.0 changelog
Clarify event_base_loop exit conditions
Typo fixes from Linus Nordberg
Typo fixes from Linus Nordberg
Merge remote-tracking branch 'sourceforge/patches-2.0' into patches-2.0

Conflicts:
	include/event2/event.h