Remove Lintian tag 'source-field-does-not-match-pkg-name'; no longer emitted by Lintian.

The Lintian tag source-field-does-not-match-pkg-name cannot be produced using standard tools. It is considered untestable in Lintian. Lintian no longer emits the tag.

The check was converted to a fatal program error. Users watching Lintian's exit status and error output can probably still detect the underlying condition.

When dpkg-source is used with the argument -DSource="some-other-name" it will produce an error similar to:

dpkg-source: error: source package has two conflicting values - some-other-name and correct-name

Removes the tag from the list of FTP autorejects.

CC: @lamby