Fix some warnings when configured with --enable-maintainer-mode.

ap_start_(shutdown|restart) are no longer static in dexter, because we
explicitly state we are creating them to be called from places other than
the parent.  This is the first in a series of patches to get the 2.0 code
to compile cleanly again.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84290 13f79535-47bb-0310-9956-ffa450edef68