Add recovery plug support to openais. This allows messages that are recovery
messages to be blocked until recovery completes. All low/medium/high messages
cannot be transmitted until all processors have unplugged themselves. If a
configuration change occurs, the plugs are invalidated and the recovery starts
again.

Makefile:
Remove two build errors with extra object file included that is not needed.
main.c:
Add recovery plug support.
gmi.c:
Add recovery plug support to group messaging.
evt.c:
Add recovery plug support to evt.
evs.c:
Add recovery plug support to evs.
l
clm.c:
Add recovery plug support to clm.
ckpt.c:
Add recovery plug support to ckpt.
amf.c:
Add recovery plug support to amf.

BKrev: 414bddd7HCsNs1rz-sJV92mB6fupCw


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@265 fd59a12c-fef9-0310-b244-a6a79926bd2f