closes#1412
separate hello and authenticate functions,
force connection close at end of write cycle so we don't
hold open idle connections,
which has the benefit of mostly removing
the chance of getting hopelessly connection lost
bump instrumental agent version
fix test to deal with better better connect/reconnect logic and changed ident & auth handshake
Update CHANGELOG.md
correct URL from instrumental fork to origin and put the change in the correct part of the file
go fmt
undo split hello and auth commands, to reduce roundtrips
21add2c799