bug#28868: 25.1; Feature request: isolate kill ring from window system cut and paste buffer

[Eli Zaretskii <eliz@gnu.org>]

> From: Brian Julin <BJulin@clarku.edu>
> Date: Mon, 16 Oct 2017 18:11:29 +0000
> 
> Ever since xterm.el added bracketed paste mode support, the #6 yank
> yanks the line of text which was pasted.  Though this is stated in the
> code comments as the desired behavior, it certainly is not the way I
> personally wish emacs to behave.  I much prefer the window system
> clipboard and selection system to have absolutely nothing to do at all
> with the emacs kill-ring (unless I run a command like x-clipboard-yank
> explicitly.)
> 
> Normally when an upgrade starts behaving in a new and upsetting
> manner, I would google and find, after quite a tedious process of
> reading random forum threads for tangentially related issues until
> I find one that actually addresses my issue, that there was a configuration
> variable available for my /etc/site-start.d files to customize such a behavior.
> In this case there appears to be none.

Thank you for your report.  Would you be willing to submit a patch
that introduces a defcustom which will allow to disable bracketed
paste mode even if the terminal support it?