Fix pod exec options

Change the command field to an array of strings.

pkg/api/v1/conversion.go

@@ -1715,7 +1715,12 @@ func init() {
 			out.Stderr = in.Stderr
 			out.TTY = in.TTY
 			out.Container = in.Container
-			out.Command = in.Command
+			if in.Command != nil {
+				out.Command = make([]string, len(in.Command))
+				for i := range in.Command {
+					out.Command[i] = in.Command[i]
+				}
+			}
 			return nil
 		},
 		func(in *newer.PodExecOptions, out *PodExecOptions, s conversion.Scope) error {
@@ -1727,7 +1732,12 @@ func init() {
 			out.Stderr = in.Stderr
 			out.TTY = in.TTY
 			out.Container = in.Container
-			out.Command = in.Command
+			if in.Command != nil {
+				out.Command = make([]string, len(in.Command))
+				for i := range in.Command {
+					out.Command[i] = in.Command[i]
+				}
+			}
 			return nil
 		},
 		func(in *PodList, out *newer.PodList, s conversion.Scope) error {

pkg/api/v1/types.go

@@ -1339,8 +1339,8 @@ type PodExecOptions struct {
 	// Container in which to execute the command.
 	Container string `json:"container,omitempty" description:"the container in which to execute the command. Defaults to only container if there is only one container in the pod."`
 
-	// Command is the remote command to execute
-	Command string `json:"command" description:"the command to execute"`
+	// Command is the remote command to execute; argv array; not executed within a shell.
+	Command []string `json:"command" description:"the command to execute; argv array; not executed within a shell"`
 }
 
 // PodProxyOptions is the query options to a Pod's proxy call