misc/49114: -vlanif of ifconfig is not documented anywhere

[ozaki-r%netbsd.org@localhost]

>Number:         49114
>Category:       misc
>Synopsis:       -vlanif of ifconfig is not documented anywhere
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    misc-bug-people
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 14 13:40:00 +0000 2014
>Originator:     Ryota Ozaki
>Release:        current
>Organization:
>Environment:
any arch
>Description:
ifconfig(8) doesn't have an item for -vlanif.
Even worse ifconfig --help doesn't show -vlanif entry.

>How-To-Repeat:

>Fix: