zsh{,-devel}: Clean up master_sites.

- Update URLs for valid mirrors.
- Remove URLs for invalid mirrors.
- Synchronize lists between zsh and zsh-devel.


git-svn-id: http://svn.macports.org/repository/macports/trunk/dports@101345 d073be05-634f-4543-b044-5fe20cf6d1d6