ftp.mirror.ac.uk is missing the by-module directory. Patch replaces
them with another UK mirror that appears to be a complete mirror.
Also removes bioinformatics.weizmann.ac.il. They are listed on the CPAN
mirror page with the host name bioinfo.weizmann.ac.il. However, they've
been refusing connections for 16 days. Recommend pulling them out for
now rather than update to the failing host name.