[php-maint] Transition to PHP 5.6

[Ondřej Surý]

Since 5.6 hit beta I think we can start to prepare transition to PHP 5.6
in unstable.

Basically that means we should recompile our reverse build depends
against version in experimental and see what happens :).

Since we are not very deep in the release cycle I would suggest to be
little bit more aggressive and upload to unstable as soon as we know
that at least 90% of the modules works with PHP 5.6. (And we have ack
from release team.)

Thougts?

O.
-- 
Ondřej Surý <ondrej at sury.org>
Knot DNS (https://www.knot-dns.cz/) – a high-performance DNS server