r1849: * dh_installinit: If run with -o, do the inverse of -n and only

r1849: * dh_installinit: If run with -o, do the inverse of -n and only
  set up maintainer script snippets, w/o installing any files.
  Useful for those edge cases where the init script is provided by upstream
  and not easily installed by dh_installinit but where it's worth letting
  it manage the maintainer scripts anyway. Closes: #140881, #184980
* -o might be added for other similar commands later if there is any
  reason to. And yeah, it means that -no is close to a no-op..