Make serf handle Connection:close headers. 
Make serf handle Connection:close headers. 

This functionality already existed in Subversion's ra_serf, but it fits better
in serf itself. Also, this ensures that response handlers don't need to change
the request queue anymore which elimates another cause of double free aborts.

* context.c
  (is_conn_closing): New function.
  (read_from_connection): Reset the connection if the server is going to close
   it.


git-svn-id: 683495cb1553624b05a54e2ba9533425f69cf277@1152 61a7d7f5-40b7-0310-9c16-bb0ea8cb1845

coapp-packages/serf,coapp-packages/serf,coapp-packages/serf