cloudbau/vagrant-openstack-plugin — pull request #93 by Chealion (2014-11-28 18:59:45+00:00)
Title: Don't release a floating IP unless it was automatically assigned.

In 0.9.0-0.10.0 the floating IP would be released on vagrant destroy. This meant you could not bring a VM back up if you had a manually specified floating IP as the IP would not longer be allocated to you requiring extra work to allocate that IP.