The arrow indicator for a glossary link was cute, but I found it way too

disturbing to the flow of text.  Here I replace it with a dashed-unline.
Also, allow the omission of the ref attribute where the glossary term is
exactly equal to the link contents.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@290712 13f79535-47bb-0310-9956-ffa450edef68