Log Message:
Update from version 0.20 to version 0.22.

Pkgsrc changes:
- adjust dependencies wrt to minimum required perl package version

Upstream changes:
0.22    Thu Jun 10 12:58:99 2010
        Add NOPASTE_SSH_MODE for chmod'ing after uploading (Thomas Sibley)
        Doc fixes (Thomas Sibley)

0.21    Sat May  1 09:32:10 2010
        Add a --list_services/-L option (David Bremner) [rt.cpan.org #55562]
        Add --private support, used in Gist (John Goulah)
        Doc fix (Salvatore Bonaccorso) [rt.cpan.org #53249]
        Doc fix (Fabien Wernli) [rt.cpan.org #54928]
        Mention 'nopaste' script (Damyan Ivanov) [rt.cpan.org #51065]