Add 'Documentation=man:opennds' to unit section of service file.

[dzatoah]

This PR adds 'Documentation=man:opennds' to unit section of service file.

[bluewavenet]

This is Debian specific and will not work for other distros. See my comments on #341

[sunweaver]

@bluewavenet The Documentation=man: is not Debian-specific.

See https://www.freedesktop.org/software/systemd/man/systemd.unit.html

(which is the upstream documentation and it lists the "man:" prefix as valid prefix).

[bluewavenet]

@sunweaver

The Documentation=man: is not Debian-specific.

This is true, but
Documentation=man:opennds
is Debian specific because the man page is only generated for Debian.

The best way forward is to remove the linux_debian/doc folder from the source.
See PR #346

[sunweaver]

Ah, specific to your Debian package build recipe. Now I understand. Why don't you ship the man page as part of the openNDS upstream code. Man pages are not Debian-specific, but useful on most other distros, as well.

[bluewavenet]

The Debian specific man page is now removed. See PR #346