worker is not the default Unix MPM. [This statement has been in the docs

ever since this was copy-and-pasted from the threaded MPM documentation,
and threaded *was* the default at one point.]

Reported by: kap@katchoo.org


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94670 13f79535-47bb-0310-9956-ffa450edef68