Generalize the type of address in EzRpcClient and EzRpcServer
Generalize the type of address in EzRpcClient and EzRpcServer

dwrensha/capnproto-rust,dwrensha/capnp-rpc-rust,placrosse/capnproto-rust,tempbottle/capnproto-rust,dwrensha/capnp-rpc-rust,tempbottle/capnp-rpc-rust,placrosse/capnp-rpc-rust,placrosse/capnp-rpc-rust,tempbottle/capnp-rpc-rust