[FS#595] odhcpd in relay mode floods network with NS packets

[LEDE Bugs]

The following task has a new comment added:

FS#595 - odhcpd in relay mode floods network with NS packets
User who did this - netprince (netprince)

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I built 17.01 with this version of odhcpd, and installed in on 7 production routers, and the problem seems to be resolved.  
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=595#comment2539