[Rd] Documentation: add link from "::" to "get" (PR#7729)

[dkoschuetzki at gmx.de]

Full_Name: Dirk Koschuetzki
Version: 2.0.1
OS: Linux (Debian Sarge)
Submission from: (NULL) (194.94.136.34)


Please add a link from the page for "::" (accessing from name spaces) to the
more general "get". 

Reason: Some package do not provide a name space add via "get" a (seoncd) method
exists to call a masked function.