wallet/rpc: Use the default maxfeerate value as BTC/kB

test/functional/feature_segwit.py

@@ -240,7 +240,7 @@ class SegWitTest(BitcoinTestFramework):
         tx.vin.append(CTxIn(COutPoint(int(txid2, 16), 0), b""))
         tx.vout.append(CTxOut(int(49.95 * COIN), CScript([OP_TRUE, OP_DROP] * 15 + [OP_TRUE])))  # Huge fee
         tx.calc_sha256()
-        txid3 = self.nodes[0].sendrawtransaction(ToHex(tx))
+        txid3 = self.nodes[0].sendrawtransaction(ToHex(tx), 0)
         assert tx.wit.is_null()
         assert txid3 in self.nodes[0].getrawmempool()