"ifconfig -vlandev" syntax

[Yar Tikhiy]

Hi folks,

As our ifconfig(8) is growing more options for special interface
types, inconsistencies sneak into their syntax.  In particular,
-vlandev takes a useless argument (vlan(4) cannot attach to more
than one parent anyway) while, e.g., -carpdev doesn't need one.
Personally, I like the latter since having to type unneeded words
on the command line annoys me.  Do you think that making -vlandev
need no arguments in CURRENT would break many existing things?

-- 
Yar