Release Engineering

Martin wrote a proposal to better define the string freeze policy (see attached document):
- the rules will be clear and published on wiki etc, so no one acts like the rules are fuzzy,
- the question goes to l10n list, yes, or, if you prefer l10n teams lead list, if that would be better and more operational,
- we don't request but kindly ask devs and writers to have 1 week in mind for those larger changes.