+ Note that if you have [n]mh files in your install directories with the same
+ names as the files being installed, the old ones will get overwritten without
+ any warning. The only directory that isn't true for is the `etc' directory
+ -- in that directory, the previous copy of each <file> will be backed up as
+ <file>.prev if it differs from the newly-installed copy. Watch for any diff
+ output while make is processing that directory to see if you need to merge
+ changes from *.prev files into the new versions.
+