In AllowOverrideList, do not allow 'None' together with other directives.

While there, improve log messages and save some memory by allocating correct
size for table.

PR 52823


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1302653 13f79535-47bb-0310-9956-ffa450edef68