MOD_MISC() and DISPATCH() macros.
Renamed new_syscall module as new_syscall_mod. It seems to be standard
to have module names ending with _mod, and this may be forced when
MOD_SYSCALL() and MOD_VFS() are updated to match MOD_MISC().
Cleaned up lkm examples a little.
o a couple of header files have been missing
o convert the LKM Makefile to use <bsd.kmod.mk>
o rename the module to ``misc_mod'' (as opposed to ``miscmod''), so
the module name can be made identical to the module's file name,
avoiding the clash with one of the component's .o file names
o modstat(1/8) has been moved meanwhile
