move login metric to phplib_local.inc, refs #4452

git-svn-id: svn://develop.studip.de/studip/trunk@31264 c5b85792-5220-0410-ad23-ed5b6b8ad999
count extern page requests, refs #4452

git-svn-id: svn://develop.studip.de/studip/trunk@31265 c5b85792-5220-0410-ad23-ed5b6b8ad999