MRT rib dump support

[Evelio VILA]

Re Hello,

Looking into this commit,

https://gitlab.labs.nic.cz/labs/bird/commit/11fabd2d6b8bc3d6ca86acd3b62fe4deeb4b91b7

I hope it doesn't mean that you will be removing BGP UPDATE dumps to add
the RIB dumps.

Will both be supported?

Thanks
Evelio