- balancer writes cause of robots.txt in log file for crawl delay
- removed log output for forced GC
- smaller RAM flush for RWI cache, should cause more usage of cache and faster crawling
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@5228 6c8d7289-2bf4-0310-a012-ef5d649a1542