bug#17839: 24.4.50; read-passwd echoes password input in non-interactive sessions

[Sebastian Wiesner]

I’m sorry to bring this issue up again, but I noticed that the patch that hides 
input was only committed to Emacs trunk.  Would it be possible to backport this 
patch to the Emacs 24 branch as well, so that it the patch is also included 
Emacs 24.4?  

I know, Emacs is in feature freeze, and I understand that this patch required 
some changes to Emacs’ internals, but considering the security implications I 
think it’d be important to include this patch in Emacs 24.4 as well, to bring 
it downstream as soon as possible.

Greetings,
Sebastian Wiesner