rpc: Document that DEFAULT is for Taproot, ALL for everything else

src/rpc/rawtransaction.cpp

@@ -785,7 +785,7 @@ static RPCHelpMan signrawtransactionwithkey()
                                 },
                         },
                         },
-                    {"sighashtype", RPCArg::Type::STR, RPCArg::Default{"DEFAULT"}, "The signature hash type. Must be one of:\n"
+                    {"sighashtype", RPCArg::Type::STR, RPCArg::Default{"DEFAULT for Taproot, ALL otherwise"}, "The signature hash type. Must be one of:\n"
             "       \"DEFAULT\"\n"
             "       \"ALL\"\n"
             "       \"NONE\"\n"

src/wallet/rpc/spend.cpp

@@ -709,7 +709,7 @@ RPCHelpMan signrawtransactionwithwallet()
                             },
                         },
                     },
-                    {"sighashtype", RPCArg::Type::STR, RPCArg::Default{"DEFAULT"}, "The signature hash type. Must be one of\n"
+                    {"sighashtype", RPCArg::Type::STR, RPCArg::Default{"DEFAULT for Taproot, ALL otherwise"}, "The signature hash type. Must be one of\n"
             "       \"DEFAULT\"\n"
             "       \"ALL\"\n"
             "       \"NONE\"\n"
@@ -1167,7 +1167,7 @@ RPCHelpMan walletprocesspsbt()
                 {
                     {"psbt", RPCArg::Type::STR, RPCArg::Optional::NO, "The transaction base64 string"},
                     {"sign", RPCArg::Type::BOOL, RPCArg::Default{true}, "Also sign the transaction when updating (requires wallet to be unlocked)"},
-                    {"sighashtype", RPCArg::Type::STR, RPCArg::Default{"DEFAULT"}, "The signature hash type to sign with if not specified by the PSBT. Must be one of\n"
+                    {"sighashtype", RPCArg::Type::STR, RPCArg::Default{"DEFAULT for Taproot, ALL otherwise"}, "The signature hash type to sign with if not specified by the PSBT. Must be one of\n"
             "       \"DEFAULT\"\n"
             "       \"ALL\"\n"
             "       \"NONE\"\n"