Hammer: rmdir deletes regular files

[Matthew Dillon]

:On an ufs partition, rmdir(1) removes only empty directories.
:
:If one uses it on a hammer filesystem, it is also able to delete regular
:files:
:
:Ufs example:
:-- 
:Francois Tigeot

    Ok, that will be in the next commit, which is looking like tomorrow.
    I have a few bug fixes to the reblocker under test right now.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>