Support high water mark on inproc socket connect before bind.
Set hwm on connect socket before bind has happend to just that of connects hwm.
Merge branch 'master' of https://github.com/zeromq/libzmq into inproc_connect_before_bind
Merge pull request #658 from ricnewton/inproc_connect_before_bind

Support high water mark on inproc socket connect before bind.