[Samba] update google password using samba password chat

[Marco Gaiarin]

Mandi! Andrew Bartlett via samba
  In chel di` si favelave...

> It never was.  It was added to the AD DC with Samba 4.5, without %
> subs.  See 878fa6ef7de420ed7f28e95113bb76bf50879553 for the commit.

Google lead me to:

	https://lists.samba.org/archive/samba-cvs/2016-July/113487.html


Uh. Ok. I've to revamp back my bad hack of looking at parent pid of the
script, to have the uid/user... ;(((

Please, consider adding at least the '%U' expansion...


PS: it was not clear to me if was added to 4.5.0 or to some 4.5.X point
    release...

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