@@ServerRoot@@, not /@@ServerRoot@@ for UserDir.

PR: 2893
Obtained from:
Submitted by:	Wiliam Stephens <stephens@design-wales.com>
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81952 13f79535-47bb-0310-9956-ffa450edef68