emulators/bochs: acpi option

[Pietro Cerutti]

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Andriy Gapon wrote:
| I need to use bochs configured with --acpi-enabled.
| I see that currently the port doesn't enable that option and doesn't
| provide any knob for it.
| The attached trivial patch should add the knob.
| Should I also file a PR or is this sufficient?

Please fill-in a PR and CC me, so that I can take it and remember to
commit it after the port freeze :)

Thanks a lot!

- --
Pietro Cerutti
gahr at FreeBSD.org

PGP Public Key:
http://gahr.ch/pgp

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