serf: mark patch as inappropriate for upstream submission

serf: mark patch as inappropriate for upstream submission

What the patch does is not suitable, as upstream would surely
want the issue with the code fixed, not removal of that code altogether.

I'd also note that serf is still semi-ummaintained, and the only consumer
of it is subversion, which is slowly but steadily fading away in favor of
git and artifact-specific solutions.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>