- added many new error codes for nat auto configuration, nat_mini and nat_test

git-svn-id: https://gnunet.org/svn/gnunet@33516 140774ce-b5e7-0310-ab8b-a85725594a96
- added many lots of new error checking to nat_auto and nat_mini. icmp_client server and client not contained in this commit.

git-svn-id: https://gnunet.org/svn/gnunet@33517 140774ce-b5e7-0310-ab8b-a85725594a96
-update to po

git-svn-id: https://gnunet.org/svn/gnunet@33520 140774ce-b5e7-0310-ab8b-a85725594a96