Merge branch 'fix-service-rx' into 'master'

Fix service validation

See merge request !126

server/service.go

@@ -31,7 +31,7 @@ var (
 	// group ACLs do not match the current ticket.
 	ErrUnauthorized = errors.New("unauthorized")
 
-	serviceRx = regexp.MustCompile(`^(?:(?:[a-z0-9][-a-z0-9]*\.)+[a-z]{2,4}|localhost)(?::[0-9]{2,5})?(?:/.*)?/$`)
+	serviceRx = regexp.MustCompile(`^(?:(?:[a-z0-9][-a-z0-9]*\.)+[a-z]{2,}|localhost)(?::[0-9]{2,5})?(?:/.*)?/$`)
 )
 
 // LoginService provides the business logic for the SSO server,