knu pointed that "THE AUTHOR" of following line should be "THE AUTHOR
AND CONTRIBUTORS"
because FreeBSD's actual License does so.
+  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
http://svn.freebsd.org/viewvc/base/head/COPYRIGHT?view=markup

So I'll change it.

-- 
NARUSE, Yui
naruse / airemix.jp