snakeoil is available under BSD 3 clause (see BSD file adjacent to this file) or GPL2 (just v2) with the following exemptions-
snakeoil/demandload.py is GPL2 only
snakeoil/fix_copy.py is GPL2 only
src/compatibility.py is PSF-2.2 or GPL2 (this file is only used on python2.4)
