[Rd] Length of seed for l'Ecuyer-CMRG

[Marius Hofert]

Dear expeRts,

./src/library/base/man/Random.Rd says that L'Ecuyer requires a seed of length 6.

./src/library/parallel/man/RngStream.Rd also mentions this, but only in the text
part; In the "Arguments"-part, it says that "seed" has to be of length 7

Also:

,----
| > RNGkind("L'Ecuyer-CMRG")
| > length(.Random.seed)
| [1] 7
`----

Is the docu old? Some clarification on the two .Rd files would be great. 

Cheers,

Marius