Return HTTP 404 response for non-active campsite’s public pages

At first i thought i had to return HTTP 410 gone in this case, but
HTTP Semantics RFC[0] says that “The 410 (Gone) status code indicates
that […] this condition is likely to be permanent. If the origin server
does not know […] whether or not the condition is permanent, the status
code 404 (Not Found) ought to be used instead.”

A non-active campsite type does not mean “deleted”, but rather
temporarily disabled, thus a 404 is the appropriate code.

[0] https://www.rfc-editor.org/rfc/rfc9110#status.410

pkg/campsite/types/public.go

@@ -34,6 +34,7 @@ func (h *PublicHandler) Handler(user *auth.User, company *auth.Company, conn *da
 			page, err := newPublicPage(r.Context(), conn, head)
 			if database.ErrorIsNotFound(err) {
 				http.NotFound(w, r)
+				return
 			} else if err != nil {
 				panic(err)
 			}
@@ -54,7 +55,7 @@ func newPublicPage(ctx context.Context, conn *database.Conn, slug string) (*publ
 	page := &publicPage{
 		PublicPage: template.NewPublicPage(),
 	}
-	row := conn.QueryRow(ctx, "select name, description::text from campsite_type where slug = $1", slug)
+	row := conn.QueryRow(ctx, "select name, description::text from campsite_type where slug = $1 and active", slug)
 	if err := row.Scan(&page.Name, &page.Description); err != nil {
 		return nil, err
 	}