scripted-diff: various renames for per-utxo consistency

Thanks to John Newberry for pointing these out.

-BEGIN VERIFY SCRIPT-
sed -i 's/\<GetCoins\>/GetCoin/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<HaveCoins\>/HaveCoin/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<HaveCoinsInCache\>/HaveCoinInCache/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<IsPruned\>/IsSpent/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<FetchCoins\>/FetchCoin/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<CoinsEntry\>/CoinEntry/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<vHashTxnToUncache\>/coins_to_uncache/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<vHashTxToUncache\>/coins_to_uncache/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<fHadTxInCache\>/had_coin_in_cache/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<coinbaseids\>/coinbase_coins/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<disconnectedids\>/disconnected_coins/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<duplicateids\>/duplicate_coins/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
sed -i 's/\<oldcoins\>/old_coin/g' src/test/coins_tests.cpp
sed -i 's/\<origcoins\>/orig_coin/g' src/*.cpp src/*.h src/*/*.cpp src/*/*.h
-END VERIFY SCRIPT-

src/bitcoin-tx.cpp

@@ -562,7 +562,7 @@ static void MutateTxSign(CMutableTransaction& tx, const std::string& flagStr)
 
             {
                 const Coin& coin = view.AccessCoin(out);
-                if (!coin.IsPruned() && coin.out.scriptPubKey != scriptPubKey) {
+                if (!coin.IsSpent() && coin.out.scriptPubKey != scriptPubKey) {
                     std::string err("Previous output scriptPubKey mismatch:\n");
                     err = err + ScriptToAsmStr(coin.out.scriptPubKey) + "\nvs:\n"+
                         ScriptToAsmStr(scriptPubKey);
@@ -598,7 +598,7 @@ static void MutateTxSign(CMutableTransaction& tx, const std::string& flagStr)
     for (unsigned int i = 0; i < mergedTx.vin.size(); i++) {
         CTxIn& txin = mergedTx.vin[i];
         const Coin& coin = view.AccessCoin(txin.prevout);
-        if (coin.IsPruned()) {
+        if (coin.IsSpent()) {
             fComplete = false;
             continue;
         }