Merge r570532, r570535, r570558 from trunk:

IndexOptions ContentType=text/html Charset=UTF-8
magic.


Document new IndexOptions options


Make Bill happy ;)

Submitted by: jim
Reviewed by: root


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@570962 13f79535-47bb-0310-9956-ffa450edef68