Ignore closure return types, as we need to support PHP < 7.

This is not really workable. Need to devise another way to run psalm
periodically without keeping it breaking the build.

See #860

Merge branch 'fix-idp-discohints' of https://github.com/m0ark/simplesamlphp into m0ark-fix-idp-discohints

Support both hint.cidr and DiscoHints->IPHint

Apache CGI support

Merge branch 'auth_source_factories' of https://github.com/unt01d/simplesamlphp into unt01d-auth_source_factories

PSR-2 Coding style

Update Spanish translation

Fix metarefresh loading by type

statistics: show decent error-message when no data is available

Support preload virtual config file

Fix edge-case #594 with integer SERVER_PORT

 Replace deprecated Sqlite-calls with PDO-calls