signin in the new t.fp.o

[Domingo Becker <domingobecker gmail com>]

There's a potential problem in the translation interface.
It's possible to sign in through http instead of https [1], and it shouldn't be.

[1] http://translate.fedoraproject.org/

New translators may not realise about it, and make their fas account
accessible to a sniffer.

kind regards

Domingo Becker