This patch removes Tarpc & Tonic GRPC and implements a customized rpc framework, which can be used by peer rpc and cli interface.
web config server can also use this rpc framework.
moreover, rewrite the public server logic, use ospf route to implement public server based networking. this make public server mesh possible.
1. fix ospf route panic if no ipv4 assigned.
2. should refetch global peer latency map every 60s
3. remove regex dep because it's too large and unnecessary.
Sijie.Sun