Return blacklist packages from /etc/slpkg/blacklist
        configuration file.

def get_black(self):
        """Return blacklist packages from /etc/slpkg/blacklist
        configuration file."""
        blacklist = []
        for read in self.black_conf.splitlines():
            read = read.lstrip()
            if not read.startswith("#"):
                blacklist.append(read.replace("\n", ""))
        return blacklist