to call a shell script which outputs nothing if the file is not present.
Remove the "whatis" file for ports where it does not contain anything
useful and hasn't been updated for years. OK tsutsui@, hubertf@.
preparation for filling the list of changes between NetBSD 3.0 and 4.0
releases. In some obsolete claims like "this is the n-th major releae of
NetBSD for the xyz platform" replace n by XXX.
