[JDEV] Patch for server SSL hang in jabberd when client is slow authenticating

[Nathan Sharp]

This patch fixes a bug where if a client connecting via SSL doesn't 
authenticate very quickly, the server will hang until the client 
finishes.  This hang requires a kill -9 to force the server to stop (in 
the case where the client hangs while authenticating).  This happens, 
for example, using Exodus when it displays one of the warning messages 
about the certificate being invalid in some way (expired, wrong cn, 
etc).   The server will stay hung until the client O.K.'s or cancels the 
dialog.

The fix is to set the socket to non-blocking mode immediately after 
accepting it, as non-blocking mode is not inherited from the listening 
socket.  I'd appreciate it if this could make it into the next patch 
release of 1.4 series!  This patch is against the 1.4.2 source code.

  Nathan

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