server: fix PEER_MSG_PATH about rf
server: fix PEER_MSG_PATH about rf

send PEER_MSG_PATH to only peers that have the same rf.

Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

a16/gobgp,fujita/gobgp,fujita/gobgp,tamihiro/gobgp,j-kato/gobgp,YujiOshima/gobgp,YujiOshima/gobgp,Dipsingh/gobgp,ishidawataru/gobgp,osrg/gobgp,a16/gobgp,osrg/gobgp,a16/gobgp,j-kato/gobgp,ramrunner/gobgp,fujita/gobgp,h-naoto/gobgp,Dipsingh/gobgp,postfix/gobgp,a16/gobgp,ramrunner/gobgp,ramrunner/gobgp,postfix/gobgp,YujiOshima/gobgp,fujita/gobgp,osrg/gobgp,ishidawataru/gobgp,tamihiro/gobgp,Dipsingh/gobgp,h-naoto/gobgp,a16/gobgp,osrg/gobgp,postfix/gobgp,j-kato/gobgp,tamihiro/gobgp,tamihiro/gobgp,a16/gobgp,a16/gobgp,ishidawataru/gobgp,h-naoto/gobgp