Update conn_rec.id when a new thread begins working on a connection, because

the old thread may work on a new connection and assign the same ID in parallel.


Submitted By:  Michael Thorpe
Committed By: covener


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1651088 13f79535-47bb-0310-9956-ffa450edef68