Refs #5172 Make sure anonymous user cannot edit segments + rename superadmin to superuser for consistency
Refs #5172 Rename siteid to idSite for consistency
Refs #5172 Fix bug, use proper idSite value
Refs #5172 Rename config setting with a clear name, adding_segment_requires_access
idSite===false is not valid use case AFAIK so removing code that deals with that.
Merge branch 'master' of github.com:piwik/piwik
Merge remote-tracking branch 'origin/master'