[Rd] Dead link in Nile help documentation (PR#14079)

[maarten.blaauw at qub.ac.uk]

When doing ?Nile, the url for the data source is dead. It says  http://www.=
ssfpack.com/dkbook/ but this has changed to=20
http://www.ssfpack.com/DKbook.html

Version:
 platform =3D i386-redhat-linux-gnu
 arch =3D i386
 os =3D linux-gnu
 system =3D i386, linux-gnu
 status =3D
 major =3D 2
 minor =3D 10.0
 year =3D 2009
 month =3D 10
 day =3D 26
 svn rev =3D 50208
 language =3D R
 version.string =3D R version 2.10.0 (2009-10-26)

Locale:
LC_CTYPE=3Den_US.UTF-8;LC_NUMERIC=3DC;LC_TIME=3Den_US.UTF-8;LC_COLLATE=3Den=
_US.UTF-8;LC_MONETARY=3DC;LC_MESSAGES=3Den_US.UTF-8;LC_PAPER=3Den_US.UTF-8;=
LC_NAME=3DC;LC_ADDRESS=3DC;LC_TELEPHONE=3DC;LC_MEASUREMENT=3Den_US.UTF-8;LC=
_IDENTIFICATION=3DC

Search Path:
 .GlobalEnv, package:stats, package:graphics, package:grDevices, package:ut=
ils, package:datasets, package:methods, Autoloads, package:base

Thanks,

Maarten

--
| Dr. Maarten Blaauw
|
| School of Geography, Archaeology & Palaeoecology
| Queen's University Belfast, UK
|
| www  http://www.chrono.qub.ac.uk/blaauw
| tel  +44 (0)28 9097 3895