Revert "Use symfony exception handler because of broken Whoops."

This reverts commit c8d31238ec5ee40b9c46c1ab66138a47d2cc745a.
Fixed file permissions
add helper method for using error_log
Merge pull request #4406 from alprs/feature/error-log-handler

[4.2] Enable easier usage of error_log in Log\Writer
move remindabletrait into reminders namespace.
Return from mail send should be void.
Merge pull request #4397 from GrahamCampbell/4.2-fix

[4.2] Fixed Whoops
Fix various permissions.