bug#71576: 30.0.50; [PATCH] Improve performance of Comint/Eshell password prompt handling

[Jim Porter]

On 6/16/2024 3:53 AM, Stefan Kangas wrote:
> Thanks.  I'd be okay with putting this patch in Emacs 30, but let's see
> what other people think.
[snip]
> If this is hardcoded in Tramp, are we sure that we need this as an
> option?  I'd suggest making it into a defconst or defvar instead.

Since no one else has expressed any concerns, I've merged this as 
1a55e957ae5 to the master branch, replacing the defcustoms with defvars.