Commit e73964fa8f incorrectly dropped the
patch 101-update-struct-msghdr.patch. Add it again, and while add it
also add the follow-up patch that was added upstream.

Fixes #3757.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

Dropped patches, unrequired.
There is a newer version released, but I cannot vouch for it yet.
We've been using this one for about a year now.

Since, I only recently became maintainer of `keepalived`, I will
push this as the current stable one, and start using a newer
version internally, before releasing it to the public.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

- Add missing sys/types.h include to provide u_short type under musl

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>