
####
# Override gravatar function so we can use https, and choose a default
sub gravatar_url \{
    my $email = lc shift;
    my $size = shift;
    $avatar_cache\{$email\} ||=
        "https://secure.gravatar.com/avatar/" .
        Digest::MD5::md5_hex($email) . "?d=mm&amp;s=";
    return $avatar_cache\{$email\} . $size;
\}
