Add the "MIT" license, from

  http://www.opensource.org/licenses/mit-license.php
and add it to DEFAULT_ACCEPTABLE_LICENSES.
Based on hints from joerg@.

licenses/mit

@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

mk/license.mk

@@ -1,4 +1,4 @@
-# $NetBSD: license.mk,v 1.21 2009/05/21 19:05:01 wiz Exp $
+# $NetBSD: license.mk,v 1.22 2009/05/26 12:19:12 he Exp $
 #
 # This file handles everything about the LICENSE variable. It is
 # included automatically by bsd.pkg.mk.
@@ -97,7 +97,7 @@ DEFAULT_ACCEPTABLE_LICENSES= \
 	gnu-gpl-v2 gnu-lgpl-v2 gnu-lgpl-v2.1 \
 	gnu-gpl-v3 gnu-lgpl-v3 \
 	original-bsd modified-bsd \
-	x11 \
+	x11 mit \
 	apache-1.1 apache-2.0 \
 	artistic artistic-2.0 \
 	cddl-1.0 \