New monitor pkg for shared monitor functionality

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

dev/docker-clients/client.nomad

@@ -23,7 +23,7 @@ job "client" {
 
         network {
           mbits = 10
-          port  "http"{}
+          port "http" {}
         }
       }