godoc warning people not to import these packages

[finishes #135458633]

Signed-off-by: Matthew Boedicker <[email protected]>

Author: XenoPhex

command/common/godoc.go

@@ -0,0 +1,3 @@
+// Package common should not be imported by external consumers. It was not
+// designed for external use.
+package common

command/flag/godoc.go

@@ -0,0 +1,3 @@
+// Package flag should not be imported by external consumers. It was not
+// designed for external use.
+package flag

command/godoc.go

@@ -0,0 +1,3 @@
+// Package command should not be imported by external consumers. It was not
+// designed for external use.
+package command

command/v2/godoc.go

@@ -0,0 +1,3 @@
+// Package v2 should not be imported by external consumers. It was not designed
+// for external use.
+package v2

command/v2/shared/godoc.go

@@ -0,0 +1,3 @@
+// Package shared should not be imported by external consumers. It was not
+// designed for external use.
+package shared

command/v3/godoc.go

@@ -0,0 +1,3 @@
+// Package v3 should not be imported by external consumers. It was not designed
+// for external use.
+package v3

command/v3/shared/godoc.go

@@ -0,0 +1,3 @@
+// Package shared should not be imported by external consumers. It was not
+// designed for external use.
+package shared