Better logging

[poelstra]

localserver.js has logging, but it had issues:

• it only logged a very limited number of requests
• did not show result codes (e.g. to see errors)
• had broken timestamps

New logging uses Apache-style logging, e.g.:

::1 - - [07/Jan/2018:13:46:20 +0000] "GET /admin HTTP/1.1" 200 1591 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/63.0.3239.84 Chrome/63.0.3239.84 Safari/537.36"
::1 - - [07/Jan/2018:13:46:20 +0000] "GET /fllscoring.appcache HTTP/1.1" 200 2064 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/63.0.3239.84 Chrome/63.0.3239.84 Safari/537.36"
::1 - - [07/Jan/2018:13:46:20 +0000] "GET /components/bootstrap-css/css/bootstrap.min.css HTTP/1.1" 304 - "http://localhost:1390/admin" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/63.0.3239.84 Chrome/63.0.3239.84 Safari/537.36"
::1 - - [07/Jan/2018:13:46:20 +0000] "GET /js/config.js HTTP/1.1" 304 - "http://localhost:1390/admin" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/63.0.3239.84 Chrome/63.0.3239.84 Safari/537.36"

[coveralls]

Changes Unknown when pulling 38f0babd842c557efc43ffabc61f19393288759b on better_logging into on master.

[coveralls]

Changes Unknown when pulling f013cf5e2f4056497bf41f60ffd688edd92188f2 on better_logging into on master.

[poelstra]

Oops, you're right! They were old commits that I still had lying around, and I thought I finished them back then...

That last middleware should have gone, but the rest of log.js probably needs to stay because it's also used for generic logging (i.e. not request-specific). That does mean the timestamp stuff in it needs to be fixed.

I.e. morgan is only used for logging the requests, it's not a generic logging mechanism.

I'll close this PR for now (working on other things in the mean time). I'll make a new one once I cleaned it up.