Merge #11309: Minor cleanups for AcceptToMemoryPool

bf64c3cb3 Ignore transactions added to mempool during a reorg for fee estimation purposes. (Alex Morcos)
04f78ab5b Do not reject based on mempool min fee when bypass_limits is set. (Alex Morcos)
fd849e1b0 Change AcceptToMemoryPool function signature (Alex Morcos)

Pull request description:

  First commit just removes default arguments from `AcceptToMemoryPool` and consolidates two arguments, it does not change behavior.

  Second commit finally fixes the fact that we're not meant to reject based on mempool min fee when adding a transaction from a disconnected block during a reorg as mentioned [here](https://github.com/bitcoin/bitcoin/pull/9602#issue-202197849)

  Third commit makes fee estimation ignore transactions added from a disconnected block during a reorg. I think this was another source of fee estimates returning estimates below 1000 sat/kB as in #11303.

Tree-SHA512: 30925ca8b341915bb214f1d2590b36b7931f2e125b7660150e38ae70338f00db5aa7f1608546dddb181446924177eb7cf62ea8bd2583068acc074d6c3f86bc0c

src/rpc/rawtransaction.cpp

@@ -942,8 +942,8 @@ UniValue sendrawtransaction(const JSONRPCRequest& request)
         // push to local node and sync with wallets
         CValidationState state;
         bool fMissingInputs;
-        bool fLimitFree = true;
-        if (!AcceptToMemoryPool(mempool, state, std::move(tx), fLimitFree, &fMissingInputs, nullptr, false, nMaxRawTxFee)) {
+        if (!AcceptToMemoryPool(mempool, state, std::move(tx), &fMissingInputs,
+                                nullptr /* plTxnReplaced */, false /* bypass_limits */, nMaxRawTxFee)) {
             if (state.IsInvalid()) {
                 throw JSONRPCError(RPC_TRANSACTION_REJECTED, strprintf("%i: %s", state.GetRejectCode(), state.GetRejectReason()));
             } else {