Check the pod after processing a connection so that we'll go away

Check the pod after processing a connection so that we'll go away
if a graceful restart occurred while we were processing the
connection.  Otherwise, we won't wake up until a real connection
comes in and we'll use the wrong config to process it and we may
block in the wrong syscall (because the new generation is using a
different accept mutex) and in general it is goofy.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89531 13f79535-47bb-0310-9956-ffa450edef68