Merge #18777: wallet: Recommend absolute path for dumpwallet

fa501700e9 wallet: Recommned absolute path for dumpwallet (MarcoFalke)

Pull request description:

  Avoids misunderstandings such as #9564

ACKs for top commit:
  kristapsk:
    utACK fa501700e9

Tree-SHA512: f675ef607992857ffeb556a2945b5436a70b39c5d83f05a8be15a6fccc84cbe9d03e52f8239e28d159e41ed7c6f119b7a38e8ab327029f04609f63c559c12c49

src/wallet/rpcdump.cpp

@@ -735,7 +735,7 @@ UniValue dumpwallet(const JSONRPCRequest& request)
                 "Note that if your wallet contains keys which are not derived from your HD seed (e.g. imported keys), these are not covered by\n"
                 "only backing up the seed itself, and must be backed up too (e.g. ensure you back up the whole dumpfile).\n",
                 {
-                    {"filename", RPCArg::Type::STR, RPCArg::Optional::NO, "The filename with path (either absolute or relative to bitcoind)"},
+                    {"filename", RPCArg::Type::STR, RPCArg::Optional::NO, "The filename with path (absolute path recommended)"},
                 },
                 RPCResult{
                     RPCResult::Type::OBJ, "", "",