dapl2

dapl2
Move close socket calls to the connection thread, to prevent accessing a socket
after it has been closed.

Remove the setsockopt call to mark listen addresses as reusable.  A reusable
address allows other libraries, such as MPI, to bind to the same address.

Create all sockets as IPPROTO_TCP, rather than undefined.

Listen on a specific address, rather than any address, to prevent two listens
from occurring on the same port, but using different IP addresses.  This
prevents connections from going to the wrong process.

git-svn-id: svn://openib.tc.cornell.edu/gen1@2472 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86