Support for BGP route reflection.

[Ondrej Zajicek]

Hello

Here is a patch adding support for BGP route reflection.

Bird can be configured to be route reflector using 'rr client'
in bgp protocol section.

The protocol bgp {                                                                                                                                                                          
	local as 1;
        neighbor 192.168.1.4 as 1;
	rr client;
}

I don't like it as it looks like the local bird is rr client of neighbor
but it really means that the neighbor is rr client of the local bird.
Any ideas?

There are some miscellaneous differences in cluster list attribute
handling connected with the fact how Bird handles more BGP neighbors
(more independent instances of BGP), but they are insignificant.

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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