[Merge] ~fnordahl/ubuntu/+source/openvswitch:extra-configure-opts into ~ubuntu-server-dev/ubuntu/+source/openvswitch:master

[Christian Ehrhardt ]

Hi Frode, welcome back

LGTM

If you do not mind (to reduce churn later on when merging with Debian) I'm picking this into the to-be-debians-ovs-based-on-ubuntu branches right away.
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https://code.launchpad.net/~fnordahl/ubuntu/+source/openvswitch/+git/openvswitch/+merge/425699
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