Thanks to Baptiste Jonglez for the patch.

Thanks to Job Snijders for the bugreport.

Although RFC 3542 allows both cases, Theo de Raadt thinks
he knows better, and msg_controllen without last padding
fails on OpenBSD.

Thanks to Job Snijders for the bugreport.

Thanks to Artyom Gavrichenkov for the patch.

Thanks to Frederik Kriewitz for the patch.

Thanks to Sergey Popovich for the original patch.

Thanks to Charlie Allom for the bugreport.

Fixes cases where the same network or external route are propagated by
several OSPF routes and some other corner cases in next hop construction
and ECMP. Allows to specify whether external routes should be merged.

Thanks to Peter Christensen for the original patch.

Stack variable may be used unitialized and that would lead to spurious
rta_free(), which may cause crash. The bug was introduced in 1.4.1 from
merging add-path branch.

Thanks to Peter Andreev for reporting it and Alexander V. Chernikov for
resolving it.

When a BFD session is removed while being scheduled for notification,
the session stays in notify list and is removed twice, which leads to
a strange crash after a while.

This function is a part of Readline interface for a long time
(with a different type).

Thanks to Aleksey Berezin for the bugreport.

Thanks to MrBr for the bugreport.

Also significant core protocol state changes needed for that,
global graceful restart recovery state and kernel proto support
for recovery.

The old static route was not removed when the nexthop changed and the
new one was not viable (no neighbor).

Thanks to Pierluigi Rolando for the original patch.

Thanks to Pierluigi Rolando and others for the bugreport.