The 3 month graphs were removed in #25175.

Up to one month ago, Tonga published a new bridge network status every
half hour.  We didn't want to process that much data and simply
ignored statuses published after :30 of the hour.  But with the recent
change to only one status per hour, it's possible that all statuses
are published after :30 of the hour, and then we ignore all them all.
Stop ignoring those statuses.  In fact, it doesn't really matter if we
process more than one status per hour, because duplicate lines will
simply be removed as part of the database import process.

Also implemented the recommended way of checking for keys in dictionaries.

We only checked uptime fraction, but that may be >= 95% regardless of
overall uptime.  Let's only consider relays that have been around for
the past two months.

Visualize the Tor network grouped by AS. With mouseovers.