Madrid —  There were long lines at registration points across Spain this week as application opened under a new amnesty program expected to see at least 500,000 undocumented migrants gain legal status to stay and work in the country.  The program came into effect this month, offering undocumented migrants a one-year renewable residence permit if they can prove they have lived in Spain for at least five months and have no criminal record.  The application window opened Monday and runs until the