core: Fail startup when the argument to ServerName looks like a glob

or a regular expression instead of a hostname (*?[]).  PR 39863 

Submitted By: Rahul Nair <rahul.g.nair gmail.com>
Reviewed By: covener



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1042098 13f79535-47bb-0310-9956-ffa450edef68