Add error filename/number and context when available to ease debugging.
Add error filename/number and context when available to ease debugging.

ghalse/simplesamlphp,ghalse/simplesamlphp,dnmvisser/simplesamlphp,simplesamlphp/simplesamlphp,dnmvisser/simplesamlphp,simplesamlphp/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,dnmvisser/simplesamlphp,simplesamlphp/simplesamlphp,simplesamlphp/simplesamlphp,dnmvisser/simplesamlphp