by checking if the macro value is true instead of it being defined.
Thanks to Mark Rosenstand.
* Make all perl scripts use strict and warnings, to ease catching errors.
+ * Refactor update-alternatives code, with the side effect that now commands
+ on non existing link group files will return an error code (except
+ for --remove, now). Closes: #273407
* Add a missing newline to a warning message in dpkg. Closes: #390914
Thanks to Ian Jackson.
* Fix typo in variable name in dpkg-source which was causing it to not