Lintian::Tag::Override -- Representation of a Lintian Override
 use Lintian::Tag::Override;
 
 my $data = {
    'comments' => ['some', 'multi-line', 'comments']
 };
 my $override = Lintian::Tag::Override->new('unused-override', $data);
 my $comments = $override->comments;
 if ($override->overrides("some extra") ) {
     # do something
 }
Represents a Lintian Override.
  - Lintian::Tag::Override->new($tag,
    $data)
- Creates a new override for $tag.
      $data should be a hashref with the following
      fields.
  - arch
- Architectures this override applies too (not really used).
- A list of comments (each item is a separate line)
- The extra part of the override. If it contains a "*" is will
      considered a pattern.
 
  - $override->tag
- Returns the name of the tag.
- $override->arch
- Returns the architecture this tag applies to.
- $override->comments
- Returns a list of lines that makes up the comments for this override.
    Do not modify the contents of this list. 
- $override->extra
- Returns the extra of this tag (or the empty string, if there is no
    extra).
- $override->is_pattern
- Returns a truth value if the extra is a pattern.
- $override->overrides($extra)
- Returns a truth value if this override applies to this extra.
Originally written by Niels Thykier <niels@thykier.net> for
    Lintian.