rpc → common Relation

File in src/rpc	Includes file in src/common
blockchain.cpp	args.h
client.cpp	args.h
external_signer.cpp	args.h
external_signer.cpp	system.h
mining.cpp	system.h
request.cpp	args.h
server.cpp	args.h
server.cpp	system.h
server_util.cpp	args.h
util.cpp	args.h