Change ap_md5_binary()'s hexification of the hash to use a
	simple lookup rather than sprintf().

PR:		3409
Submitted by:	Ronald Tschalar <ronald@innovation.ch>
Reviewed by:	Ken Coar


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82419 13f79535-47bb-0310-9956-ffa450edef68