Prior to the existence of mod_setenv it was necessary to tweak the TZ

environment variable in the apache core.  But that tweaking interferes
with mod_setenv.  So don't tweak if the user has specified an explicit
TZ variable.

PR:		1888
Submitted by:	Jay Soffian <jay@cimedia.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80459 13f79535-47bb-0310-9956-ffa450edef68