checkmail prints an error message like
Argument "AI_NUMERICHOST" isn't numeric in subroutine
entry at /usr/lib/perl5/Net/DNS/Resolver/Base.pm
line 743.
every time. Change shebang to "perl -w" from "perl -W".
Update version number (in comment line too, where it
was stillt 0.5).
Update TODO and Changelog.
Include TODO in repository.
Release 0.6.1 (maintenance).
Signed-off-by: Thomas Hochstein <thh@inter.net>