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>

sockets/unix_socket.go

@@ -14,6 +14,9 @@ import (
 	"github.com/opencontainers/runc/libcontainer/user"
 )
 
+// NewUnixSocket creates a unix socket with the specified path and group.
+// The channel passed is used to activate the listenbuffer when the caller is ready
+// to accept connections.
 func NewUnixSocket(path, group string, activate <-chan struct{}) (net.Listener, error) {
 	if err := syscall.Unlink(path); err != nil && !os.IsNotExist(err) {
 		return nil, err