-* #487006: dh_installman with 3-letter codes
-* apply patch in #557603 (breaks compatibility slightly; see #560120)
-* clean up dh's handling of options passed onto commands it calls,
- by implementing one of the changes discussed in #570039
- (either change #3, change #4, or change #5; change #0 was done, but
- was an incomplete workaround)
-* better package arch filtering for -N , -p (#576990)
-* Convert warning about unknown command-line options back to an error.
-* Support DEB_BUILD_OPTIONS=debug ; maybe also support passing
- -g -O2 by default. See patch (and discussion of why this breaks
- compatability) in #544844.