Marius Strobl 6f135a7584 When setting media always and not just in case of switching to IFM_AUTO
clear the options of the current media, i.e. only inherit the instance,
which matches what NetBSD does. Without this it's really non-intuitive
that the following sequence:
	ifconfig bge0 media 1000baseT mediaopt full-duplex
	ifconfig bge0 media 100baseTX
results in 100baseTX full-duplex to be set or that:
	ifconfig bge0 media autoselect mediaopt flowcontrol
	ifconfig bge0 media 1000baseT mediaopt full-duplex
tries to set 1000baseT full-duplex with flowcontrol, which isn't suported
und thus fails while the following:
	ifconfig re0 media 1000baseT mediaopt flowcontrol,full-duplex
	ifconfig re0 media autoselect
just switches to autoselection without flowcontrol.

MFC after:	2 weeks
2011-05-15 12:51:00 +00:00
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