lb_active: let request confidence parameter also be 0

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6923 71766da9-9752-0410-ab17-bfafa751c56a
lb_stats: use integers for load values

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6924 71766da9-9752-0410-ab17-bfafa751c56a
lb_active: define load metric depending on the balancing method

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6925 71766da9-9752-0410-ab17-bfafa751c56a
lb_info: retrieve load balancing metrics only once

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6926 71766da9-9752-0410-ab17-bfafa751c56a
lb_active_karger: regression of r6921

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6927 71766da9-9752-0410-ab17-bfafa751c56a
lb_active_karger: use lists:keyfind/3 instead of lists:keysearch/3

git-svn-id: https://scalaris.googlecode.com/svn/trunk@6928 71766da9-9752-0410-ab17-bfafa751c56a