Session:
regenerate session id after some time or random.
Default is 'never', can be 'interval' form 0 to 1h and random from always to 1 in 100
Session also checks that strict session settings are enabled
Login class:
Automatic re-read of acl settings after some time (default 5min, can be chnaged via option).
Default set strict headers, can be turned off via option
Moved various parts into their own methods and cleaned up double call logic.
Login is now recorded in the last login entry
no more debug flags are read from the database anymore
All options are set via array and not with a single option (was auto login)
create new session on class call, there is no need to delay that at all
new option to auto write close a session
session_id and session_name are stored as class vars
deprecate the __set/__get part because we do not want to set via ->session_var_name
but use the set()/get() methods.
They have been renamed from setS/getS... to set/get alone
DB Class throws Exception if on init it fails to connect to the DB,
will not throw Exception if failed connection during execution but
will do the normal retry and soft failure run
DB\ArrayIO will throw Exception on missing table array and table name
All Exceptions have a code set
