rewrite the mirror command (run_command_mirror)
rewrite the mirror command (run_command_mirror)

Improvements:
- Custom mirror (m command) now works
- Ask for mirror after last page
- Easier logic (less efficient)

dagolden/App-perlbrew,josl/App-perlbrew,rafl/App-perlbrew,Asuza/App-perlbrew,Asuza/App-perlbrew,calid/App-perlbrew,ptolemarch/App-perlbrew,rafl/App-perlbrew,rafl/App-perlbrew,ptolemarch/App-perlbrew,ptolemarch/App-perlbrew,josl/App-perlbrew,Asuza/App-perlbrew,josl/App-perlbrew,calid/App-perlbrew,dagolden/App-perlbrew