Pull in the Connection handling part of the v1.3 patch for HTTP/1.1.

Some preliminary HTTP/1.1 work
Some comments and fixes
PR:
Obtained from:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88518 13f79535-47bb-0310-9956-ffa450edef68