Do not use atol() for the Content-Length parsing as its handling of error

      cases is undetermined by the ANSI C standard.

Instead, use strtol() with a check for the ERANGE error condition.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95740 13f79535-47bb-0310-9956-ffa450edef68