#1 Logging

[Adrian Perez de Castro]

It would be nice to have the ability of logging to a
file, and a config option to specify which file to use
as log, like:

log = "/path/to/log";

Errors should be put there, so they are easily tracked.
This might be very useful to successfully set-up
MoonSoon itself to manage the Home page of the project
at http://moonsoon.sf.net

This implies making MoonSoon write to the log _always_
before exiting due to an error. This also means that
stderr might need to be redirected to the log file (or
meybe a separate error log), considering two config
options:

event_log = "/path/to/evenvt.log" ;
error_log = "/path/to/error.log" ;