Remove a bunch of string functions from Apache. These are basically

standard string functions like strstr, strcasecmp, etc that Apache used
to define for platforms that don't have them.  These functions and the
feature tests have moved down to APR where they really belong.  In doing
this, I am also able to remove a bunch of tests from the Apache configure
process.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@85487 13f79535-47bb-0310-9956-ffa450edef68