Go 1.14 now streams t.Log output as it happens [1], so we no longer need
to maintain our log STDOUT helper.
I preserved the interface, so `testlog` still takes in a `*testing.T`
though unused. Changing it requires so too many changes that I didn't
want to make quite yet.
[1] https://golang.org/doc/go1.14#go-test
Adds new package that can be used by client and server RPC endpoints to
facilitate monitoring based off of a logger
clean up old code
small comment about write
rm old comment about minsize
rename to Monitor
Removes connection logic from monitor command
Keep connection logic in endpoints, use a channel to send results from
monitoring
use new multisink logger and interfaces
small test for dropped messages
update go-hclogger and update sink/intercept logger interfaces
The e2e test code is absolutely hideous and leaks processes and files
on disk. NomadAgent seems useful, but the clientstate e2e tests are very
messy and slow. The last test "Corrupt" is probably the most useful as
it explicitly corrupts the state file whereas the other tests attempt to
reproduce steps thought to cause corruption in earlier releases of
Nomad.
