Freeze in preparation for pkgsrc-2013Q2 branch

[Alistair Crooks <agc%pkgsrc.org@localhost>]

... will happen at 06:59 UTC June 17th 2013.

The freeze is for infrastructure changes, and no new packages will be
allowed to be added.

We expect the freeze to last no longer than 2 weeks.

Best wishes,
Alistair