That's one of the reasons why when I start getting a qw// that's spanning more than 2-ish lines I've taken to changing to using YAML::Syck in a here-doc sort of like this:

use YAML::Syck qw( Load );
my @servers = @{ Load( <<'EOT' ) };
## Now I can have comments
- 213.123.20.134
- 213.123.20.119
- 213.123.20.120
- 213.123.20.121  
EOT
[download]

If the list grows even longer you can easily move it after your __END__ token and change to my $server_data = do { local $/; <DATA> };  my @servers = @{ Load( $server_data ) };; and it's not a big step from there to swap to a separate data file and use LoadFile instead.