- Global configuration handling.

- Decided against file globbing config, would be convoluted for this
case.
- Decided to stick with Unix socket instead of TCP port (can't have them
both for the same pool).
- Flushing handlers and waiting for service to come online.
- Logging to syslog.
- Better assertions.
- Added test for changes.
- Updated TODO list (didn't have to set user as web server, comes
correct by default).