When sending PUT_LONG, the data is sent before headers, and sometimes
the header is not flushed immediately. This creates a lot of unexpected
receives in the peer, since it would posts a receive only when gets the
header, which makes it run out of receive buffers. When the sender
eventually flushes the window, the receiver already has no buffers to
receive the header, which causes a deadlock.
The fix is to always flush the headers when doing put_long.
cmr=v1.8.1:reviewer=hjelmn
This commit was SVN r31378.
7efb724d7b