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/consensus/tx_verify.cpp

@@ -214,7 +214,7 @@ bool Consensus::CheckTxInputs(const CTransaction& tx, CValidationState& state, c
         {
             const COutPoint &prevout = tx.vin[i].prevout;
             const Coin& coin = inputs.AccessCoin(prevout);
-            assert(!coin.IsPruned());
+            assert(!coin.IsSpent());
 
             // If prev is coinbase, check that it's matured
             if (coin.IsCoinBase()) {