Bugfix: Use standard BTC unit in comments

src/main.h

@@ -552,7 +552,7 @@ public:
             if (nBlockSize == 1)
             {
                 // Transactions under 10K are free
-                // (about 4500bc if made of 50bc inputs)
+                // (about 4500 BTC if made of 50 BTC inputs)
                 if (nBytes < 10000)
                     nMinFee = 0;
             }

src/test/wallet_tests.cpp

@@ -164,11 +164,11 @@ BOOST_AUTO_TEST_CASE(coin_selection_tests)
         add_coin( 3*COIN);
         add_coin( 4*COIN); // now we have 5+6+7+8+18+20+30+100+200+300+400 = 1094 cents
         BOOST_CHECK( wallet.SelectCoinsMinConf(95 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet));
-        BOOST_CHECK_EQUAL(nValueRet, 1 * COIN);  // we should get 1 bitcoin in 1 coin
+        BOOST_CHECK_EQUAL(nValueRet, 1 * COIN);  // we should get 1 BTC in 1 coin
         BOOST_CHECK_EQUAL(setCoinsRet.size(), 1);
 
         BOOST_CHECK( wallet.SelectCoinsMinConf(195 * CENT, 1, 1, vCoins, setCoinsRet, nValueRet));
-        BOOST_CHECK_EQUAL(nValueRet, 2 * COIN);  // we should get 2 bitcoins in 1 coin
+        BOOST_CHECK_EQUAL(nValueRet, 2 * COIN);  // we should get 2 BTC in 1 coin
         BOOST_CHECK_EQUAL(setCoinsRet.size(), 1);
 
         // empty the wallet and start again, now with fractions of a cent, to test sub-cent change avoidance