Shows routes that would be exported to the protocol but are rejected by
the export filter.

Thanks to João Taveira Araújo for the original patch.

When an interface goes down, (Linux) kernel removes routes pointing to
that ifacem but does not send withdraws for them. We rescan the
kernel table to ensure synchronization.

Thanks to Alexander Demenshin for the bugreport.

Thanks to Michael Fincham for the bugreport.

The bug was introduced in 05476c4d.

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.