for the netware MPM, move HARD_THREAD_LIMIT back to mpm_default.h where

the other user-tunable compile-time parameters are

HARD_SERVER_LIMIT stays in mpm_netware.c since it can't really be changed


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92533 13f79535-47bb-0310-9956-ffa450edef68