Merge #9602: Remove coin age priority and free transactions - implementation

b421e6d Update example bitcoin.conf (Alex Morcos)
7d4e950 Allow setting minrelaytxfee to 0 (Alex Morcos)
359e8a0 [cleanup] Remove coin age priority completely. (Alex Morcos)
f9b9371 [rpc] Remove priorityDelta from prioritisetransaction (Alex Morcos)
49be7e1 [rpc] Remove priority information from mempool RPC calls (Alex Morcos)
0315888 [test] Remove priority from tests (Alex Morcos)
f838005 No longer allow "free" transactions (Alex Morcos)
ad727f4 [rpc] sendrawtransaction no longer bypasses minRelayTxFee (Alex Morcos)
fe282ac [cleanup] Remove estimatePriority and estimateSmartPriority (Alex Morcos)
400b151 [debug] Change -printpriority option (Alex Morcos)
272b25a [mining] Remove -blockprioritysize. (Alex Morcos)
12839cd [rpc] Remove estimatepriority and estimatesmartpriority. (Alex Morcos)
ddf58c7 wallet: Remove sendfree (MarcoFalke)

Tree-SHA512: a9a4499405923ce794ef18f9e334dbbd59dfc73a3dc2df6f85cc9c62af6f353ec2eed9c2d5e58e904f918d0d7ab738f403dd4939d9bc2276136864fe63710782

src/miner.h

@@ -158,10 +158,6 @@ private:
     int64_t nLockTimeCutoff;
     const CChainParams& chainparams;
 
-    // Variables used for addPriorityTxs
-    int lastFewTxs;
-    bool blockFinished;
-
 public:
     struct Options {
         Options();
@@ -184,17 +180,9 @@ private:
     void AddToBlock(CTxMemPool::txiter iter);
 
     // Methods for how to add transactions to a block.
-    /** Add transactions based on tx "priority" */
-    void addPriorityTxs();
     /** Add transactions based on feerate including unconfirmed ancestors */
     void addPackageTxs();
 
-    // helper function for addPriorityTxs
-    /** Test if tx will still "fit" in the block */
-    bool TestForBlock(CTxMemPool::txiter iter);
-    /** Test if tx still has unconfirmed parents not yet in block */
-    bool isStillDependent(CTxMemPool::txiter iter);
-
     // helper functions for addPackageTxs()
     /** Remove confirmed (inBlock) entries from given set */
     void onlyUnconfirmed(CTxMemPool::setEntries& testSet);