marius 2c3e165ed0 Teach ifconfig(8) the handy shared option shortcut aliases the NetBSD
counterpart also takes, i.e. "fdx" for "full-duplex", "flow" for
"flowcontrol", "hdx" for "half-duplex" as well as "loop" and "loopback"
for "hw-loopback".

MFC after:	1 week
2011-01-05 15:28:30 +00:00
..
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2010-10-29 18:41:09 +00:00
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