Properly fix DOCROOT matching code so that it can resolve symlinked homedirs.

Fix off by one month error when logging requests.
Nuke the PATH environment values and set to some sane value.
initgroups to the target user and group instead of trying unsuccessfully
to prune it.
Generally cleanup to make code match official Apache style.
Reviewed by: Jason Dour, Randy Terbush
Submitted by: Jason Dour, Randy Terbush


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77360 13f79535-47bb-0310-9956-ffa450edef68