Merge #10677: RPC Docs: addmultisigaddress is intended for non-watchonly addresses

73041c3c99 RPC Docs: addmultisigaddress is intended for non-watchonly addresses (Gregory Sanders)

Pull request description:

  Spent a couple hours debugging why my p2sh watchonly funds were not appearing in various accounting calls when address was imported via `addmultisigaddress`.

Tree-SHA512: 0673e276e5ca8cdc4c9357bd835a29bd5a994520a78179600944932c700917142930288bf179f5e89b0874beaf1a88bd70129f3a297a46df42a10bab847017bb

src/wallet/rpcwallet.cpp

@@ -1155,6 +1155,8 @@ UniValue addmultisigaddress(const JSONRPCRequest& request)
         std::string msg = "addmultisigaddress nrequired [\"key\",...] ( \"account\" )\n"
             "\nAdd a nrequired-to-sign multisignature address to the wallet. Requires a new wallet backup.\n"
             "Each key is a Bitcoin address or hex-encoded public key.\n"
+            "This functionality is only intended for use with non-watchonly addresses.\n"
+            "See `importaddress` for watchonly p2sh address support.\n"
             "If 'account' is specified (DEPRECATED), assign address to that account.\n"
 
             "\nArguments:\n"