Switch to LGPLv2+ for most code

Since we're making a shared library, it should be usable by non-GPL
apps.

To allow more code sharing between the core and the tests, move them
to the LGPLv2+ too.

A few bits of test and other code are still GPL.  See the new COPYING
file for more information.

triggers.d/immodules.trigger

@@ -3,19 +3,20 @@
 #
 # Written by Matthias Clasen <mclasen@redhat.com>
 #
-# 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 library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser 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,
+# This library 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the
+# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
 
 # IfExecutable: gtk-query-immodules-3.0
 # REMatch: /lib.*/gtk-3\.0/3\.0\.0/immodules/.*\.so