func (l *Log) SetVModule(spec ModuleSpec) {
	l.mu.Lock()
	defer l.mu.Unlock()
	l.setVState(l.verbosity, spec.filter, nil, true)
}
func (l *Log) SetVModule(spec ModuleSpec) {
	l.mu.Lock()
	defer l.mu.Unlock()
	l.setVState(l.verbosity, spec.filter, nil, true)
}
// SetModuleSpec sets the comma-separated list of pattern=N settings for
// file-filtered logging