json serialization for rpc-relevant monero types

Structured {de-,}serialization methods for (many new) types
which are used for requests or responses in the RPC.

New types include RPC requests and responses, and structs which compose
types within those.

# Conflicts:
#	src/cryptonote_core/blockchain.cpp

src/daemon/command_line_args.h

@@ -64,6 +64,31 @@ namespace daemon_args
   , "Max number of threads to use for a parallel job"
   , 0
   };
+
+  const command_line::arg_descriptor<std::string> arg_zmq_rpc_bind_ip   = {
+    "zmq-rpc-bind-ip"
+      , "IP for ZMQ RPC server to listen on"
+      , "127.0.0.1"
+  };
+
+  const command_line::arg_descriptor<std::string> arg_zmq_rpc_bind_port = {
+    "zmq-rpc-bind-port"
+      , "Port for ZMQ RPC server to listen on"
+      , std::to_string(config::ZMQ_RPC_DEFAULT_PORT)
+  };
+
+  const command_line::arg_descriptor<std::string> arg_zmq_testnet_rpc_bind_port = {
+    "zmq-testnet-rpc-bind-port"
+      , "Port for testnet ZMQ RPC server to listen on"
+      , std::to_string(config::testnet::ZMQ_RPC_DEFAULT_PORT)
+  };
+
+  const command_line::arg_descriptor<bool> arg_zmq_restricted_rpc = {
+    "zmq-restricted-rpc"
+      , "Restrict ZMQ RPC to view only commands"
+      , false
+  };
+
 }  // namespace daemon_args
 
 #endif // DAEMON_COMMAND_LINE_ARGS_H