[Rd] Rcmd install mypkg

[hadley wickham]

> Requiring Perl script names to be specified in a case-sensitive way
> doesn't affect the R build process, but it does mean that a script
> written on Windows is slightly more likely to work when someone runs it
> on another platform.  There's an "install" command in at least some
> flavours of Unix that would be invoked instead of R's INSTALL script if
> you said "R CMD install" on one of those platforms, and that's not a
> good thing.

Will this be changing on OS X too?  My version of 2006-09-20 r39433
accepts either upper or lower case commands.

Hadley