Change "insane" to "absurd" (referring to high fees) in text strings and identifiers.

Note that this will also require translation changes in Transifex for the key
"A fee higher than %1 is considered an insanely high fee." which is now
"A fee higher than %1 is considered an absurdly high fee."

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

src/wallet.cpp

@@ -2365,9 +2365,9 @@ int CMerkleTx::GetBlocksToMaturity() const
 }
 
 
-bool CMerkleTx::AcceptToMemoryPool(bool fLimitFree, bool fRejectInsaneFee)
+bool CMerkleTx::AcceptToMemoryPool(bool fLimitFree, bool fRejectAbsurdFee)
 {
     CValidationState state;
-    return ::AcceptToMemoryPool(mempool, state, *this, fLimitFree, NULL, fRejectInsaneFee);
+    return ::AcceptToMemoryPool(mempool, state, *this, fLimitFree, NULL, fRejectAbsurdFee);
 }