Litecoin: Reduce Dust thresholds by 10x

DUST_SOFT_LIMIT of 0.001 means a penalty of an additional mintxfee
is charged for each output smaller than 0.001.  This is a key
behavioral disincentive in Litecoin's anti-spam design.

DUST_HARD_LIMIT of 0.00001 means inputs smaller than this size are
ignored by the wallet, not available to coin selection and
effectively do not exist.  This too discourages spam.

src/main.h

@@ -50,9 +50,9 @@ static const unsigned int UNDOFILE_CHUNK_SIZE = 0x100000; // 1 MiB
 /** Fake height value used in CCoins to signify they are only in the memory pool (since 0.8) */
 static const unsigned int MEMPOOL_HEIGHT = 0x7FFFFFFF;
 /** Dust Soft Limit, allowed with additional fee per output */
-static const int64 DUST_SOFT_LIMIT = 1000000; // 0.01 LTC
+static const int64 DUST_SOFT_LIMIT = 100000; // 0.001 LTC
 /** Dust Hard Limit, ignored as wallet inputs (mininput default) */
-static const int64 DUST_HARD_LIMIT = 10000;   // 0.0001 LTC mininput
+static const int64 DUST_HARD_LIMIT = 1000;   // 0.00001 LTC mininput
 /** No amount larger than this (in satoshi) is valid */
 static const int64 MAX_MONEY = 84000000 * COIN;
 inline bool MoneyRange(int64 nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); }