Rarely -- but it happens -- the connectivity client gets ECONNREFUSED
because the connectivity agent listen() backlog is too small. Rather
than put in a loop on the client side, take the simple way out for
now: increase the backlog size to an arbitrarily-large number.
Reviewed by Dave Goodell.
cmr=v1.8.2:reviewer=ompi-rm1.8
This commit was SVN r32543.