Add canonical import comment

Signed-off-by: Daniel Nephin <dnephin@docker.com>

rewritten from github.com/moby/moby 4f0d95fa6ee7f865597c03b9e63702cdcb0f7067

frontend/dockerfile/command/command.go

@@ -1,5 +1,5 @@
 // Package command contains the set of Dockerfile commands.
-package command
+package command // import "github.com/docker/docker/builder/dockerfile/command"
 
 // Define constants for the command strings
 const (

frontend/dockerfile/instructions/bflag.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import (
 	"fmt"

frontend/dockerfile/instructions/bflag_test.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import (
 	"testing"

frontend/dockerfile/instructions/commands.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import (
 	"errors"

frontend/dockerfile/instructions/errors_unix.go

@@ -1,6 +1,6 @@
 // +build !windows
 
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import "fmt"
 

frontend/dockerfile/instructions/errors_windows.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import (
 	"fmt"

frontend/dockerfile/instructions/parse.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import (
 	"fmt"

frontend/dockerfile/instructions/parse_test.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import (
 	"strings"

frontend/dockerfile/instructions/support.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import "strings"
 

frontend/dockerfile/instructions/support_test.go

@@ -1,4 +1,4 @@
-package instructions
+package instructions // import "github.com/docker/docker/builder/dockerfile/instructions"
 
 import "testing"
 

frontend/dockerfile/parser/json_test.go

@@ -1,4 +1,4 @@
-package parser
+package parser // import "github.com/docker/docker/builder/dockerfile/parser"
 
 import (
 	"testing"

frontend/dockerfile/parser/line_parsers.go

@@ -1,4 +1,4 @@
-package parser
+package parser // import "github.com/docker/docker/builder/dockerfile/parser"
 
 // line parsers are dispatch calls that parse a single unit of text into a
 // Node object which contains the whole statement. Dockerfiles have varied

frontend/dockerfile/parser/line_parsers_test.go

@@ -1,4 +1,4 @@
-package parser
+package parser // import "github.com/docker/docker/builder/dockerfile/parser"
 
 import (
 	"testing"

frontend/dockerfile/parser/parser.go

@@ -1,5 +1,5 @@
 // Package parser implements a parser and parse tree dumper for Dockerfiles.
-package parser
+package parser // import "github.com/docker/docker/builder/dockerfile/parser"
 
 import (
 	"bufio"

frontend/dockerfile/parser/parser_test.go

@@ -1,4 +1,4 @@
-package parser
+package parser // import "github.com/docker/docker/builder/dockerfile/parser"
 
 import (
 	"bufio"

frontend/dockerfile/parser/split_command.go

@@ -1,4 +1,4 @@
-package parser
+package parser // import "github.com/docker/docker/builder/dockerfile/parser"
 
 import (
 	"strings"

frontend/dockerfile/shell/equal_env_unix.go

@@ -1,6 +1,6 @@
 // +build !windows
 
-package shell
+package shell // import "github.com/docker/docker/builder/dockerfile/shell"
 
 // EqualEnvKeys compare two strings and returns true if they are equal. On
 // Windows this comparison is case insensitive.

frontend/dockerfile/shell/equal_env_windows.go

@@ -1,4 +1,4 @@
-package shell
+package shell // import "github.com/docker/docker/builder/dockerfile/shell"
 
 import "strings"
 

frontend/dockerfile/shell/lex.go

@@ -1,4 +1,4 @@
-package shell
+package shell // import "github.com/docker/docker/builder/dockerfile/shell"
 
 import (
 	"bytes"

frontend/dockerfile/shell/lex_test.go

@@ -1,4 +1,4 @@
-package shell
+package shell // import "github.com/docker/docker/builder/dockerfile/shell"
 
 import (
 	"bufio"