[PATCH] Part 2 of low level 802.1p priority support

[Bruce M. Simpson]

This updated patch moves VLAN tag decapsulation into if_ethersubr.c and 
always uses M_VLANTAG, which is also passed to the upper layer.

Tests with ping:
fxp (no VLAN_HWTAGGING support)      OK
msk (VLAN_HWTAGGING enabled)         OK
msk (VLAN_HWTAGGING disanabled)     FAIL

I am concerned that this may need review and testing to support 
situations where we do nested VLANs or with bridge(4) before it can be 
committed.

Further testing with drivers is needed (I can't be 100% sure it fails 
with msk(4) because something strange is happening when vlan tagging is 
turned off). Perhaps Pyun knows?

Regards,
BMS


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