[Cython] Jenkins down

[Stefan Behnel]

Hi,

just to let you know that sage.math (where our Jenkins instance runs) has
been down for a couple of days already and it's currently unclear when it
will be back. Most likely during the next days, though. Note that this
means that we have lost all work spaces and git caches, so the first builds
will take somewhat longer than normal once we get it restarted (assuming
that everything comes up nicely in the first place...).

Stefan