Comment 11 for bug 1018586

tl;dr The current code should be correct.

old naming = blah-pid
new naming = blah.pid
That was changed upstream in:
http://code.google.com/p/pylockfile/source/detail?r=102
That was released upstream in 0.9.1

But nova overrides lockfile naming since essex-1-2022-geb42e7f
The new regexp is correct for that.
I.E. diablo lock files and named depending on lockfile version,
but diablo doesn't have the cleaning code, so that is moot.

p.s. This cleanup code doesn't work on windows I think,
as it's assuming file rather than directory locks.
Maybe os.link is available on windows but I don't think
it's available in python yet.