Revert r220310 and r220312 to bring mod_setenvif docs in line with

code.

Reviewed by: colm, jorton, trawick, jerenkrantz


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@264993 13f79535-47bb-0310-9956-ffa450edef68