MDL-29030 fix remaining report linking hacks

Please note all plugin references from core should use callbacks, it is not ok to use capabilities or links to plugins because they may not be present in customised installs.

admin/mnet/tabs.php

@@ -38,7 +38,7 @@ $strmnetlog        = get_string('mnetlog', 'mnet');
 $strmnetedithost   = get_string('reviewhostdetails', 'mnet');
 
 $logurl = $CFG->wwwroot.
-          '/course/report/log/index.php?chooselog=1&showusers=1&showcourses=1&host_course='.$mnet_peer->id.
+          '/report/log/index.php?chooselog=1&showusers=1&showcourses=1&host_course='.$mnet_peer->id.
           '%2F1&user='.'0'.
           '&date=0'.
           '&modid=&modaction=0&logformat=showashtml';