backport r1552852 from trunk:

replace EBCDIC-only remnants of httpd / dependency on apr_xlate that made it
into the apr_escape implementation.



git-svn-id: https://svn.apache.org/repos/asf/apr/apr/branches/1.5.x@1552863 13f79535-47bb-0310-9956-ffa450edef68