[FS#932] TP-Link WR841N: mixed VLANs on the same port

[LEDE Bugs]

The following task has a new comment added:

FS#932 - TP-Link WR841N: mixed VLANs on the same port
User who did this - HeNet (HeNet)

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The switch seems to support mixed VLANs.

https://github.com/Deoptim/atheros/raw/master/QCA9531_V2.0_nowatermark.pdf
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=932#comment3130