Added license exemption for OpenSSL to source headers

src/command/command.c

@@ -18,6 +18,18 @@
  * You should have received a copy of the GNU General Public License
  * along with Profanity.  If not, see <http://www.gnu.org/licenses/>.
  *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link the code of portions of this program with the OpenSSL library under
+ * certain conditions as described in each individual source file, and
+ * distribute linked combinations including the two.
+ *
+ * You must obey the GNU General Public License in all respects for all of the
+ * code used other than OpenSSL. If you modify file(s) with this exception, you
+ * may extend this exception to your version of the file(s), but you are not
+ * obligated to do so. If you do not wish to do so, delete this exception
+ * statement from your version. If you delete this exception statement from all
+ * source files in the program, then also delete it here.
+ *
  */
 
 #include <assert.h>