Take in the new HIDE feature to avoid namespace conflicts by using "Rule

HIDE=yes" in the Configuration file.  Basically this patch adds a
pre-generated include/hide.h file and the helpers/UpdateHide script for
updating it when new functions are added. All other changes were just to make
sure the conf.h file is really included (which itself includes hide.h if HIDE
is defined), because we need the redefinition list everywhere to hide every
function.

Submitted by: Ralf S. Engelschall
Reviewed by: Jim Jagielski, Dean Gaudet, Martin Kraemer, Ralf S. Engelschall


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80345 13f79535-47bb-0310-9956-ffa450edef68