The changes include:
* Change license blobs in source files to mention GPLv3+ not GPLv2 only
* Add GPLv3+ license text
* Package COPYING not LICENSE as the license blobs (even the old ones)
mention COPYING specifically, it is also more common, I think
https://fedorahosted.org/freeipa/ticket/239
This attribute is required for samba to properly identify a user has changed
it's password and doesn't need to change it again at next login.
At the same time, if we are forcing a pssword reset we also need to let samba
know the user must change its password.
The plugin was getting difficult to read and maintain.
Split it (and apply cosmetic cleanups to some functions) in smaller
pieces that perform specific tasks.
