Bugfix: RPC/Mining: Document non-standard "priority" key (on transaction Objects) for block templates

Author: luke-jr

src/rpc/mining.cpp

@@ -633,6 +633,7 @@ static RPCHelpMan getblocktemplate()
                             {RPCResult::Type::NUM, "", "transactions before this one (by 1-based index in 'transactions' list) that must be present in the final block if this one is"},
                         }},
                         {RPCResult::Type::NUM, "fee", "difference in value between transaction inputs and outputs (in satoshis); for coinbase transactions, this is a negative Number of the total collected block fees (ie, not including the block subsidy); if key is not present, fee is unknown and clients MUST NOT assume there isn't one"},
+                        {RPCResult::Type::NUM, "priority", /*optional=*/true, "transaction coin-age priority (non-standard)"},
                         {RPCResult::Type::NUM, "sigops", "total SigOps cost, as counted for purposes of block limits; if key is not present, sigop cost is unknown and clients MUST NOT assume it is zero"},
                         {RPCResult::Type::NUM, "weight", "total transaction weight, as counted for purposes of block limits"},
                     }},