bug#63941: [PATCH] ; always CRLF before non-first boundary in multipart form

[Eli Zaretskii <eliz@gnu.org>]

> From: ozzloy <ozzloy@gmail.com>
> Date: Sun, 18 Jun 2023 16:23:23 -0700
> Cc: 63941@debbugs.gnu.org
> 
> > who knows where it is used?
> 
> As far as I can tell, it is only ever used by =(eww-submit ...)= from
> =lisp/net/eww.el=.  That's the only place it's used in all of emacs,
> and every reference I can find on the web.
> 
> I've tested the heck out of it now, and also used firefox, chromium,
> and curl to generate http messages for comparison.
> 
> Those tests of the different versions of
> =mm-url-encode-multipart-form-data=, as well as the http messages
> generated by firefox, chromium, and curl can be seen here
> 
> https://git.sr.ht/~ozzloy/emacs-bug-63941/tree/53a7949a5db21c456c1da3b4add29343c3d02137/item/mm-url-tests.el
> 
> 
> The patch I have attached to this email generates output that matches
> firefox, chromium, and curl.  It also includes a bunch of tests for
> the included version of =mm-url-encode-multipart-form-data=
> 
> If there's some change that would make the patch a better fit, let me
> know.  I'm happy to modify it.

Thanks.  I really need some Gnus/eww expert to look into this and
review the patch.