Merge r291452, r291454 from trunk:

* server/connection.c (ap_lingering_close): Fix lingering close to
really match the 1.3 behaviour: read from the client for up to ~30
seconds in total.  Current behaviour will attempt only 15 read() calls
then give up.

* server/connection.c (ap_lingering_close): Cleanup; no functional change.

PR: 35292


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@291469 13f79535-47bb-0310-9956-ffa450edef68