The variable is intended to control the timeout for replication
events. If someone had significantly reduced it via configuration
then it could have caused certmogner requests to fail due to timeouts.

Add replication_wait_timeout, certmonger_wait_timeout and
http_timeout to the default.conf man page.

Related: https://pagure.io/freeipa/issue/7971


Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>