tidy up some charset recoding issues

the "need" for APACHE_XLATE went away some years ago when BUFF went
POOF and charset recoding (translation) of non-protocol data
could no longer be performed by the core...


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101894 13f79535-47bb-0310-9956-ffa450edef68