The GPLv3 FAQ suggests to upgrade by
[...] replace all your existing v2 license notices (usually at the
top of each file) with the new recommended text available on the GNU
licenses howto. It's more future-proof because it no longer includes
the FSF's postal mailing address.
This removes the postal address, but leaves the version number at 2+.
As of svn 1.7, many svn calls expect "canonical" paths. In theory, we should
call svn.core.*canonicalize() on all paths before passing them to the API.
Instead, we assume the base url is canonical and copy the behaviour of svn URL
encoding function so we can extend it safely with new components.
