Fix a lot of the fallback from the apr_ssize_t to apr_size_t change

Submitted by:	Victor J. Orlikowski <v.j.orlikowski@gte.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86915 13f79535-47bb-0310-9956-ffa450edef68