[FS#481] odhcpd: make log level a UCI file option

[LEDE Bugs]

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FS#481 - odhcpd: make log level a UCI file option
User who did this: Baptiste Jonglez (bjonglez)
Status: Unconfirmed -> Assigned
Assigned To: [-] -> Hans Dedecker

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=481