[FS#75] udhcpc duplicate session and high cpu usage on wrong interface

[LEDE Bugs]

The following task is now closed:

FS#75 - udhcpc duplicate session and high cpu usage on wrong interface
User who did this - Mathias Kresin (mkresin)

Reason for closing: Works for me
Additional comments about closing: From reporter: Reboot (SNAPSHOT, r3904-c3778f2) can't duplicate it anymore.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=75