Make shared object loading work again (now that -DHIDE is the default).

Distributed modules are loaded with AP_<name>_module and custom
modules are now loaded with the fallback strategy via <name>_module
(because their <name>_module is not and canno be hidden by hide.h).


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80649 13f79535-47bb-0310-9956-ffa450edef68