Invert logic for env var utf-8 fixing.

Now we exclude a list of vars which we know for sure they
dont hold utf-8 chars; all other vars will be fixed. This
has the benefit that now also all vars from 3rd-party
modules will be fixed.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1146932 13f79535-47bb-0310-9956-ffa450edef68