the tahoe-lafs logging system is hard to discover

[zooko]

docs/logging.rst explains how to get logging info out of your Tahoe-LAFS node. (Mostly for developers editing the source code, but also potentially useful for operators.) Nobody discovers this! Many people have reported a similar problem, frustration, and waste of time as Itamar did just now on IRC:

<itamar1> can someone help me with tahoe's logging code?
<zooko> itamar1: I can!  [10:14]
<zooko> Actually, there's a doc.
<itamar1> oh
<zooko> So, let's see if that doc answers your questions
<itamar1> I guess I should've looked for docs first :)
<zooko> find docs -iname '*log*'
* itamar1 goes looking
<zooko> Well, secondly I wonder if the existence of that doc could be
		better-documented!  [10:15]
<zooko> Maybe linked from some "devel" page about tahoe-lafs...
* zooko looks at https://tahoe-lafs.org/trac/tahoe-lafs/wiki/Dev
<itamar1> I sort've expected everything to be logged by default  [10:16]
<zooko> Hm, well I'm not sure how to make the logging doc more discoverable.
<zooko> Many people have had that exact same problem, including me many times.
<zooko> I more or less approve of Brian's decision to make logging terse by
		default.
<zooko> But
<itamar1> and then spent sometime trying to find log level settings in command
		  line help
<zooko> I'd really like to help people figure it out more easily.
<zooko> Yeah, I'm sure a lot of people have lost time like that. Many have
		reported it on the IRC channel.