Allow logging to syslog

[andir]

In my installation I do not want anything in the webroot to be writable. The logs are currently written to $projectDir/var/log (or similar) whereas I would like them to end up in syslog so I can use my usual log collection, rotation, streaming, … setup without having to worry about strichliste. Another possible way might be just sending them through the standard PHP error mechanism which is already configured to pipe things to syslog (through the php-fpm settings).

(Opening this after an discussion with @schinken on IRC)

[schinken]

Any preferred logging format or events?

[schinken]

Ah you mean just the error log of symfony, right? Not events like "evt=boughtItem price=xxx userId=1232" etc

[andir]

Yes, just simply the error logs that currently vanish into somewhere (when there are not writeable files) :)

[schinken]

Okidoke. Im going to read some docs and try to change that!