A2SERVER's setup no longer takes the -os or os arguments (the security
paradigm shift suggests this is unnecessary and even unwise), and it's
time to actually install the debupdate script.
An unusual quirk of git is that it tends not to like trailing whitespace
at the end of lines, and trailing blank lines at the end of a file. It
messes with the word diffs a bit I think. Anyway, it's easily removed,
so I've removed it.
