Pull up following revision(s) (requested by pgoyette in ticket #449):
sys/kern/kern_module.c: 1.126-1.130
Add additional duplicate-module-name check in case we have two modules
with the same internal name but no conflicting symbol definitions.
When we load a module from the file system, the filename may have no
relationship to the internal module's name.  Furthermore, comparing
the module's filename is insufficient if the file is loaded from an
absolute path.
--
Use KASSERT to ensure that the newly-added module's name can be found.
--
Change a KASSERTMSG into a regular module_error - not nice for the
kernel
to panic when I try to modload the 'ntfs' module.
--
When looking for a duplicate module name, also check the pending list.
--
Remove the check for duplicate-module-name-on-pending-list since it really
doesn't help.  The check really cannot fail, and it only looks at the list
belonging to the current level of recursion.
Instead, verify that the module's modcmd(MODULE_CMD_INIT, ...) does not
introduce a duplicate module name as a result of recursively calling
module_do_load().

(snj)