bug#31446: 26.1; sql-interactive-mode buffer naming is broken

[Eli Zaretskii]

> Date: Tue, 29 May 2018 10:36:13 -0400
> From: Michael Mauger <mmauger@protonmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>, "psainty\\@orcon.net.nz" 
> <psainty@orcon.net.nz>, "31446\\@debbugs.gnu.org" <31446@debbugs.gnu.org>
> 
> I realize that 26.1 has been released, so my changes obviously won't make it.

We could put them in Emacs 26.2, if the changes are relatively safe
bugfixes.

Thanks.