Given a list of paths to .csv files from /cat/log/fwnua/machine/
this program counts how many users are online at any point in time
and outputs pairs of <time changed>, <new count value>.
Sessions shorter than 1 minute or longer than 1 day are filtered out.
Malformed sessions with no known start or no known end are identified and
stored, but currently dropped before counting.
Sessions with an end dated earlier in time than their start (apparent time-travel)
are also identified, stored, and later dropped, as well as "valid" sessions
that overlap with previously seen sessions due to a preceding time-travel.
./pull_data.sh uses rsync to grab all the fwnua machines data and
store it at machine/
Each script in select/ outputs a list of files that make up a "lab".
./go.sh runs the counting program on each "lab", storing the output in
output/*.csv files.
./go.sh also rsyncs the output files over to
a shared location in my (tad's) home directory.