Auto merge of #2100 - str4d:2074-rpc, r=arcalinea

Bitcoin 0.12 RPC PRs 1

Cherry-picked from the following upstream PRs:

- bitcoin/bitcoin#6266
- bitcoin/bitcoin#6257
- bitcoin/bitcoin#6271
- bitcoin/bitcoin#6158
- bitcoin/bitcoin#6307
- bitcoin/bitcoin#6290
- bitcoin/bitcoin#6262
- bitcoin/bitcoin#6088
- bitcoin/bitcoin#6339
- bitcoin/bitcoin#6299 (partial, remainder in #2099)
- bitcoin/bitcoin#6350
- bitcoin/bitcoin#6247
- bitcoin/bitcoin#6362
- bitcoin/bitcoin#5486
- bitcoin/bitcoin#6417
- bitcoin/bitcoin#6398 (partial, remainder was included in #1950)
- bitcoin/bitcoin#6444
- bitcoin/bitcoin#6456 (partial, remainder was included in #2082)
- bitcoin/bitcoin#6380
- bitcoin/bitcoin#6970

Part of #2074.

src/wallet/wallet.h

@@ -912,8 +912,9 @@ public:
     CAmount GetWatchOnlyBalance() const;
     CAmount GetUnconfirmedWatchOnlyBalance() const;
     CAmount GetImmatureWatchOnlyBalance() const;
-    bool CreateTransaction(const std::vector<CRecipient>& vecSend,
-                           CWalletTx& wtxNew, CReserveKey& reservekey, CAmount& nFeeRet, int& nChangePosRet, std::string& strFailReason, const CCoinControl *coinControl = NULL);
+    bool FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosRet, std::string& strFailReason);
+    bool CreateTransaction(const std::vector<CRecipient>& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, CAmount& nFeeRet, int& nChangePosRet,
+                           std::string& strFailReason, const CCoinControl *coinControl = NULL, bool sign = true);
     bool CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey);
 
     static CFeeRate minTxFee;