--no-header flag implementation for generate systemd

Signed-off-by: Jakub Guzik <jakubmguzik@gmail.com>

pkg/api/handlers/libpod/generate.go

@@ -18,6 +18,7 @@ func GenerateSystemd(w http.ResponseWriter, r *http.Request) {
 	query := struct {
 		Name            bool   `schema:"useName"`
 		New             bool   `schema:"new"`
+		NoHeader        bool   `schema:"noHeader"`
 		RestartPolicy   string `schema:"restartPolicy"`
 		StopTimeout     uint   `schema:"stopTimeout"`
 		ContainerPrefix string `schema:"containerPrefix"`
@@ -41,6 +42,7 @@ func GenerateSystemd(w http.ResponseWriter, r *http.Request) {
 	options := entities.GenerateSystemdOptions{
 		Name:            query.Name,
 		New:             query.New,
+		NoHeader:        query.NoHeader,
 		RestartPolicy:   query.RestartPolicy,
 		StopTimeout:     &query.StopTimeout,
 		ContainerPrefix: query.ContainerPrefix,

pkg/api/server/register_generate.go

@@ -32,6 +32,11 @@ func (s *APIServer) registerGenerateHandlers(r *mux.Router) error {
 	//    default: false
 	//    description: Create a new container instead of starting an existing one.
 	//  - in: query
+	//    name: noHeader
+	//    type: boolean
+	//    default: false
+	//    description: Do not generate the header including the Podman version and the timestamp.
+	//  - in: query
 	//    name: time
 	//    type: integer
 	//    default: 10