Simplify code
Pass parameters to parent class
Add missing parameter to TCPDF constructor
This variable never exists here
Fix method call (can not pass params by name)
This variable never exists here
Pass forgotten parameter
These need to be global to make this actually work
Correctly pass usernam in signon auth
Drop unused private attributes
Properly use global offset variable
Properly set global message
Correctly remember URL
Drop some unused local variables

Found by PMD on our CI server