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

[Eli Zaretskii]

> From: Filipp Gunbin <fgunbin@fastmail.fm>
> Cc: psainty@orcon.net.nz,  31446@debbugs.gnu.org
> Date: Mon, 21 May 2018 02:53:08 +0300
> 
> That looks reasonable, but, as I wrote earlier, why implement
> name-choosing logic here, if it's in `sql-comint' already.  Even if some
> of such logic was here before the fix, it doesn't necessarily mean that
> was right.

Maybe I'm missing something, but it looks like sql-comint and
sql-product-interactive belong to 2 different families of entry points
in the package.  Some call sql-product-interactive, while the others
call sql-comint.  Isn't that so?