Another one in the department of fairly useless patches which

      are best described as feature creep. Allows ${ENV} constructs
in the config file. This avoids the need for mod_perl or
m4 cleverness whilst mainting some of the usefullness. It
does not do (of course) multiline things or anything that clever.

Feel free to flame me.

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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84765 13f79535-47bb-0310-9956-ffa450edef68