Merge bitcoin#24453: Bugfix: doc: Correct change_address/changeAddress in wallet RPC help

e827202 doc: Use human-friendly DefaultHint for change_address/changeAddress in wallet RPC help (Luke Dashjr)
9d5e693 Bugfix: doc: Correct type of change_address/changeAddress in wallet RPC help (STR, not STR_HEX) (Luke Dashjr)

Pull request description:

ACKs for top commit:
  achow101:
    ACK e827202

Tree-SHA512: da4db2b241160c93ea66f8c572c69d4688f52a5fd8c32b66b1192925fcb360baf91be9771eaca178f5b08e1920559174260ed57caddcffade48156ec0c83c0bc

Author: MarcoFalke

src/wallet/rpc/spend.cpp

@@ -548,7 +548,7 @@ RPCHelpMan fundrawtransaction()
                             {"include_unsafe", RPCArg::Type::BOOL, RPCArg::Default{false}, "Include inputs that are not safe to spend (unconfirmed transactions from outside keys and unconfirmed replacement transactions).\n"
                                                           "Warning: the resulting transaction may become invalid if one of the unsafe inputs disappears.\n"
                                                           "If that happens, you will need to fund the transaction with different inputs and republish it."},
-                            {"changeAddress", RPCArg::Type::STR, RPCArg::DefaultHint{"pool address"}, "The Dash address to receive the change"},
+                            {"changeAddress", RPCArg::Type::STR, RPCArg::DefaultHint{"automatic"}, "The Dash address to receive the change"},
                             {"changePosition", RPCArg::Type::NUM, RPCArg::DefaultHint{"random"}, "The index of the change output"},
                             {"includeWatching", RPCArg::Type::BOOL, RPCArg::DefaultHint{"true for watch-only wallets, otherwise false"}, "Also select inputs which are watch only.\n"
                                                           "Only solvable inputs can be used. Watch-only destinations are solvable if the public key and/or output script was imported,\n"
@@ -762,7 +762,7 @@ RPCHelpMan send()
                                                           "Warning: the resulting transaction may become invalid if one of the unsafe inputs disappears.\n"
                                                           "If that happens, you will need to fund the transaction with different inputs and republish it."},
                     {"add_to_wallet", RPCArg::Type::BOOL, RPCArg::Default{true}, "When false, returns a serialized transaction which will not be added to the wallet or broadcast"},
-                    {"change_address", RPCArg::Type::STR_HEX, RPCArg::DefaultHint{"pool address"}, "The Dash address to receive the change"},
+                    {"change_address", RPCArg::Type::STR, RPCArg::DefaultHint{"automatic"}, "The Dash address to receive the change"},
                     {"change_position", RPCArg::Type::NUM, RPCArg::DefaultHint{"random"}, "The index of the change output"},
                     {"conf_target", RPCArg::Type::NUM, RPCArg::DefaultHint{"wallet -txconfirmtarget"}, "Confirmation target in blocks"},
                     {"estimate_mode", RPCArg::Type::STR, RPCArg::Default{"unset"}, std::string() + "The fee estimate mode, must be one of (case insensitive):\n"
@@ -1063,7 +1063,7 @@ RPCHelpMan walletcreatefundedpsbt()
                     {"include_unsafe", RPCArg::Type::BOOL, RPCArg::Default{false}, "Include inputs that are not safe to spend (unconfirmed transactions from outside keys and unconfirmed replacement transactions).\n"
                                                     "Warning: the resulting transaction may become invalid if one of the unsafe inputs disappears.\n"
                                                     "If that happens, you will need to fund the transaction with different inputs and republish it."},
-                    {"changeAddress", RPCArg::Type::STR_HEX, RPCArg::DefaultHint{"pool address"}, "The Dash address to receive the change"},
+                    {"changeAddress", RPCArg::Type::STR, RPCArg::DefaultHint{"automatic"}, "The Dash address to receive the change"},
                     {"changePosition", RPCArg::Type::NUM, RPCArg::DefaultHint{"random"}, "The index of the change output"},
                     {"includeWatching", RPCArg::Type::BOOL, RPCArg::DefaultHint{"true for watch-only wallets, otherwise false"}, "Also select inputs which are watch only"},
                     {"lockUnspents", RPCArg::Type::BOOL, RPCArg::Default{false}, "Lock selected unspent outputs"},