Fix CVE-2023-48795: (terrapin attack)
The SSH transport protocol with certain OpenSSH extensions allows remote
attackers to bypass integrity checks such that some packets are omitted (from
the extension negotiation message), and a client and server may consequently
end up with a connection for which some security features have been downgraded
or disabled, aka a Terrapin attack.
Individual packages like dropbear, frr, iproute2 ... all came with a copy of
gitignore rules already present in the base file.
Those rules have been dropped.
Dropbear version shipped in Debian does not have PAM support enabled. For the
VyOS console server it would be nice to have the possibility to use RADIUS
authentication.
