feat(cmd, config): support REPLICAOF command and replicaof config option (apache#2678)

Author: PragmaTwice

src/commands/cmd_server.cc

@@ -1362,6 +1362,7 @@ REDIS_REGISTER_COMMANDS(Server, MakeCmdAttr<CommandAuth>("auth", 2, "read-only o
                         MakeCmdAttr<CommandLastSave>("lastsave", 1, "read-only", NO_KEY),
                         MakeCmdAttr<CommandFlushBackup>("flushbackup", 1, "read-only no-script", NO_KEY),
                         MakeCmdAttr<CommandSlaveOf>("slaveof", 3, "read-only exclusive no-script", NO_KEY),
+                        MakeCmdAttr<CommandSlaveOf>("replicaof", 3, "read-only exclusive no-script", NO_KEY),
                         MakeCmdAttr<CommandStats>("stats", 1, "read-only", NO_KEY),
                         MakeCmdAttr<CommandRdb>("rdb", -3, "write exclusive", NO_KEY),
                         MakeCmdAttr<CommandReset>("reset", 1, "ok-loading bypass-multi no-script", NO_KEY),