Add note about closed PR. If a PR was filed, it's probably worthy to be

listed in CHANGES (IMHO).

I meant to include this with the vhost.c commit.
I am not doing good with commits today.  Grr.

PR: 7441


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94656 13f79535-47bb-0310-9956-ffa450edef68