http://php.net/manual/en/errorfunc.configuration.php#ini.display-errors

Fixed sizes faired well to start, but it's now proven useful to be able to increase these limits in a controlled fashion.

Fixes #122

If an event callback fatals or times out, it can deadlock. By catching the fatal (PHP 7+), deadlock is avoided.

Fixes #105
Fixes #117

Since this is meant to run as a service, sites should be able to flag themselves as disabled.

CSV is too hacky, and it was only used because #113 disguised why JSON didn't work.

Partially revert 59f81411, obviated by 536d0079

From `line()`'s inline doc:

> Display informational message without prefix, and ignore `--quiet`.