Comment 3 for bug 1257467

Reviewed: https://review.openstack.org/59858
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=794a1325dfc8a6937412a597f19acecf08d4b34a
Submitter: Jenkins
Branch: master

commit 794a1325dfc8a6937412a597f19acecf08d4b34a
Author: dekehn <email address hidden>
Date: Tue Dec 3 15:28:55 2013 -0700

    extra_dhcp_opt add checks for empty strings

    When passing extra-dhcp-opt into the port-create where an empty string
    is provided as opt_value=' ', the create and update routine will load the
    empty string into the DB. The result when written to the opts file is:
    "tag:ece4c8aa-15c9-4f6b-8c42-7d4e285734bf,option:server-ip-address", which
    when read by dnsmasq has been tested to cause dnsmasq to segment fault.

    Change-Id: I31de4a3d27092bb219d20221c5ef5a6b22e050dc
    Closes-Bug: #1257467