options missing from man page

[Hachmann]

1. export-margin option missing:
https://gitlab.com/inkscape/inkscape/blob/0.92.x/src/main.cpp#L356

2. export-wmf and export-emf options missing:
https://gitlab.com/inkscape/inkscape/blob/0.92.x/src/main.cpp#L440

3. dbus-listen, dbus-name
https://gitlab.com/inkscape/inkscape/blob/0.92.x/src/main.cpp#L506
(who can use these? Is it compiled with dbus by default? What does this actually do?)

4. convert-dpi-method
https://gitlab.com/inkscape/inkscape/blob/0.92.x/src/main.cpp#L542

And I just saw that piping could be used before, for output:
https://gitlab.com/inkscape/inkscape-docs/documentation/blob/0.92.x/man/inkscape.pod.in#L245
(but it was more complicated)

[Patrick Storz (ede123)]

Closing in favor of https://gitlab.com/inkscape/inkscape-docs/documentation/issues/2