Store user agents for every page request

Reopening for consideration in contrib Statistics 2.x

There are clearly privacy consequences tied to this, that make me want to mark this .

That's in part why the accesslog table was removed in #1446956: Remove the accesslog from statistics → .

RTBC'ing this so the maintainer @fgm can make a decision.

Based on #9 I agree that this should be at least opt-in.

@wim leers, @anybody : indeed, the plan for Statistics focuses on providing anonymous statistics without a hint of PII. So, at the very least, this will not be committed as such, and and is not for the plans for the module itself, unless they can be anonymized to a sufficient extent.

I kept this instead of marking won't fix, to keep the feature request in mind for the 2.x API design, to possibly support such a use case for contribs on top of the module. So, setting to CNW instead.

@fgm: Perfect, yes I think that's exactly the way to go.