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>

parsers/operatingsystem/operatingsystem_windows.go

@@ -8,6 +8,7 @@ import (
 // See https://code.google.com/p/go/source/browse/src/pkg/mime/type_windows.go?r=d14520ac25bf6940785aabb71f5be453a286f58c
 // for a similar sample
 
+// GetOperatingSystem gets the name of the current operating system.
 func GetOperatingSystem() (string, error) {
 
 	var h syscall.Handle
@@ -41,7 +42,8 @@ func GetOperatingSystem() (string, error) {
 	return ret, nil
 }
 
-// No-op on Windows
+// IsContainerized returns true if we are running inside a container.
+// No-op on Windows, always returns false.
 func IsContainerized() (bool, error) {
 	return false, nil
 }