If "@APACHECTL_ULIMIT@" is used in apachectl.in, then something must

replace it by a sensible (platform dependent?) value upon "make install".
Until that is done, $ULIMIT_MAX_FILES is set to the empty string
so that apachectl does not cause a subsequent error
  @APACHECTL_ULIMIT@: not found


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@96071 13f79535-47bb-0310-9956-ffa450edef68