defect 368
A report of totemsrp not merging configurations led to this
enhancement.

totemsrp.c:
The totem protocol would not previously merge a configuration
until a multicast message was sent. This change sends a special
"merge detect" message if no message has been multicast in some
time from the representative. This merge detect message will
trigger other processors to enter the gather state and form
a new configuration if they were not previously part of the
current configuration.
Makefile:
Build aisexec when libtotem.a changes.

BKrev: 42484f5453Wf6HN2Gbyg9dznFaQGtw


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@557 fd59a12c-fef9-0310-b244-a6a79926bd2f