code: func (j *Job) TagsMatchHost(host *Host) bool {
  	for k, v := range j.Tags() {
  		if w, ok := host.Tags[k]; !ok || v != w {
  			return false
  		}
  	}
  	return true
  }
docs: // TagsMatchHost checks whether all of the job's tags match the corresponding
  // host's tags