Allow Require expr to work when the expression is quoted.

For example as appears in our documentation:
Require expr "%{TIME_HOUR} -ge 9 && %{TIME_HOUR} -le 17"

PR: 56235


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1585609 13f79535-47bb-0310-9956-ffa450edef68