stat() system call caching; lighttpd can utilize FAM/Gamin to cache stat call.
possible values are: disable, simple or fam.
no stat() call is cached (a single request might result in 3-4 stat() calls)
If your files are changing in size a lot, you might have to have the stat-cache
- simple (default)
cache each stat() call for one second.
if FAM or gamin are installed and lighty is linked against those libraries you
can use them to control the freshness of the stat-cache.
server.stat-cache-engine = "simple"