A newly created child now has a start_time of 0, to prevent

mod_status from displaying a bogus value for the "time to
process most recent request" column for freshly-started children
in a previously-used scoreboard slot.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@99600 13f79535-47bb-0310-9956-ffa450edef68