[R] rodbc windows doesn't find dsn

[Jack Tanner]

Prof Brian Ripley wrote:
> Well, we don't know what you are doing!  RODBC does work with system DSNs,
> but did you try odbcDriverConnect?  Let me read the help page for you 

odbcDriverConnect("DSN=foo") works, but odbcConnect("foo") fails as
described earlier. Is this as intended?

This seems weird, because odbcConnect("foo") works under Linux for
connecting to the same database (using the same version of the MySQL
ODBC driver, and unixODBC, but a user DSN).