Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2003-11-08 09:57:47 -0800 (Sat, 08 Nov 2003)
Starting work on global caching.
This commit removes the "function" key into the cache.
The idea was that the cache memoizes results from several functions,
which are distinguished by a string key. This was so that scanner
results and rule results could be distinguished.
However, this isn't really necessary, because scanner targets
and rule targets are different.