hello.c is released under public domain.  This is distributed in the hope that
it will be useful, but without any warranty; without even the implied warranty
of merchantability or fitness for a particular purpose.

A reference to /usr/share/common-licenses/GPL to make it look like this
package is under the GPL and trigger the OpenSSL warning.

Test for old FSF address:

Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

Test for deprecated nätionäl äncoding.

Improper capitalization of linux or debian isn't caught here.