memcache.h/.cpp: doc updates
Automated rebranding to Oracle copyright/license strings via filemuncher
iprt/memcache.h: Some more optimizations and more benchmarks.
tstRTMemCache: Testcase + bug fixes. Works pretty well, but should try tune it a bit.
RTMemCache: Initial coding (completely untested).
include/iprt: scm cleaning up spaces.
iprt/memcache.h: a reminder.