Lint on pkg/* packages

- pkg/useragent
- pkg/units
- pkg/ulimit
- pkg/truncindex
- pkg/timeoutconn
- pkg/term
- pkg/tarsum
- pkg/tailfile
- pkg/systemd
- pkg/stringutils
- pkg/stringid
- pkg/streamformatter
- pkg/sockets
- pkg/signal
- pkg/proxy
- pkg/progressreader
- pkg/pools
- pkg/plugins
- pkg/pidfile
- pkg/parsers
- pkg/parsers/filters
- pkg/parsers/kernel
- pkg/parsers/operatingsystem

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

timeoutconn/timeoutconn.go

@@ -1,3 +1,4 @@
+// Package timeoutconn provides overridden net.Conn that supports deadline (timeout).
 package timeoutconn
 
 import (
@@ -5,11 +6,13 @@ import (
 	"time"
 )
 
+// New creates a net.Conn with a timeout for every Read operation.
 func New(netConn net.Conn, timeout time.Duration) net.Conn {
 	return &conn{netConn, timeout}
 }
 
-// A net.Conn that sets a deadline for every Read or Write operation
+// A net.Conn that sets a deadline for every Read operation.
+// FIXME was documented the deadline was on Write operation too but not implement
 type conn struct {
 	net.Conn
 	timeout time.Duration