Capitalize AP_DEBUG_ASSERT(). All macros should shout, even

if their forbearers (e.g., ap_assert()) did not.
Submitted by:	Greg Stein


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86621 13f79535-47bb-0310-9956-ffa450edef68