bug#27178: 26.0.50; libxml-parse-*-region functions ignore discard-comments argument

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: npostavs@users.sourceforge.net,  27178@debbugs.gnu.org,  eefacm@gmail.com
> Date: Sat, 14 Apr 2018 15:11:44 +0200
> 
> On the other hand, we could deprecate that option (since it's rather
> nonsensical the way it is now), and just provide a Lisp convenience
> function to delete the comments if you don't want comments?  I think
> that sounds cleaner and much easier to implement.

That is also fine with me, thanks.