Add the license to these files.

They are assumed to be GPLv2 as all of pulledpork is. This addresses issue #234

contrib/README.CONTRIB

@@ -1,4 +1,7 @@
 This file is essentially a manifest of the contrib directory.
 
+Unless a license is specified, anything in this contrib directory is governed
+by the GPLv2 license.
+
 oink-conv.pl - tool that converts oinkmaster config files to pulledpork config files
  * Author: Russell Fulton

contrib/oink-conv.pl

@@ -1,14 +1,26 @@
 #! /usr/bin/perl -w
 
 # simple script to convert oinkmaster conf files to the files that PulledPork understands... 
-
 # non comment lines other than disablesid, enablesid or modifysid go into pp.conf
-
 # I've used this successfully on a couple of large oinkmaster.conf files
-
 # as always ymmv. - Contributed by Russell Fulton
 
 # usage: perl oink-conv.pl oinkmaster.conf
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
 
 open(DIS, ">disabled.conf") || die "failed to open disabled file"; 
 open(EN, ">enabled.conf") || die "failed to open enabled file";