bug fixes.
- The gengetopt option parser has been replaced by the
- [lopsub](http://people.tuebingen.mpg.de/maan/lopsub) library. Hence
+ [lopsub](https://people.tuebingen.mpg.de/maan/lopsub) library. Hence
lopsub must be installed to compile this package. help2man is
no longer required since lopsub has built-in roff support.