I have little option, but to agree with Reuben Thomas. The bottom of README.Debian.nfsv4 has a date of "Wed, 11 Oct 2006 15:18:03 +0200", more than 10 years old.
Even for Debian being in the distribution for 10 years no longer qualifies as "rather new". A 2.6 kernel is no longer "recent" in light of Debian being on 4.9 now. The lines suggested to be added to /etc/services on the client are now present in Debian's default /etc/services file. Yeah, that file needs a bit of an update or removal... -- (\___(\___(\______ --=> 8-) EHM <=-- ______/)___/)___/) \BS ( | ehem+sig...@m5p.com PGP 87145445 | ) / \_CS\ | _____ -O #include <stddisclaimer.h> O- _____ | / _/ 8A19\___\_|_/58D2 7E3D DDF4 7BA6 <-PGP-> 41D1 B375 37D0 8714\_|_/___/5445