Force all Apache functions to be linked into the executable, whether they

Force all Apache functions to be linked into the executable, whether they
are used or not.  This uses the same mechanism that is used for APR
and APR-util.  This may not be the correct solution, but it works, and that
is what I really care about.  This also renames CHARSET_EBCDIC to
AP_CHARSET_EBCDIC.  This is for namespace correctness, but it also makes
the exports script a bit easier.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87424 13f79535-47bb-0310-9956-ffa450edef68