Fix golint warnings

Signed-off-by: Alexander Morozov <lk4d4@docker.com>

devicemapper/devmapper_wrapper_deferred_remove.go

@@ -8,7 +8,7 @@ package devicemapper
 */
 import "C"
 
-// LibraryDeferredRemovalsupport is supported when statically linked.
+// LibraryDeferredRemovalSupport is supported when statically linked.
 const LibraryDeferredRemovalSupport = true
 
 func dmTaskDeferredRemoveFct(task *cdmTask) int {

mflag/flag.go

@@ -589,7 +589,7 @@ var Usage = func() {
 	PrintDefaults()
 }
 
-// Usage prints to standard error a usage message documenting the standard command layout
+// ShortUsage prints to standard error a usage message documenting the standard command layout
 // The function is a variable that may be changed to point to a custom function.
 var ShortUsage = func() {
 	fmt.Fprintf(CommandLine.output, "Usage of %s:\n", os.Args[0])

stringid/stringid.go

@@ -34,7 +34,7 @@ func TruncateID(id string) string {
 
 func generateID(crypto bool) string {
 	b := make([]byte, 32)
-	var r io.Reader = random.Reader
+	r := random.Reader
 	if crypto {
 		r = rand.Reader
 	}

tarsum/tarsum.go

@@ -146,7 +146,7 @@ var (
 	}
 )
 
-// TarSum default is "sha256"
+// DefaultTHash is default TarSum hashing algoritm - "sha256".
 var DefaultTHash = NewTHash("sha256", sha256.New)
 
 type simpleTHash struct {

tlsconfig/config.go

@@ -47,8 +47,9 @@ var clientCipherSuites = []uint16{
 	tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
 }
 
-// For use by code which already has a crypto/tls options struct but wants to
-// use a commonly accepted set of TLS cipher suites, with known weak algorithms removed
+// DefaultServerAcceptedCiphers should be uses by code which already has a crypto/tls
+// options struct but wants to use a commonly accepted set of TLS cipher suites, with
+// known weak algorithms removed.
 var DefaultServerAcceptedCiphers = append(clientCipherSuites, acceptedCBCCiphers...)
 
 // ServerDefault is a secure-enough TLS configuration for the server TLS configuration.