o go ahead and document ibss-master and ibss modes, since there are
patches in the pipeline to support them.
o Note that they aren't implemented yet.
o Note that different regulatory domains have different default
channels.
o Note that Lucent cards prior to firmware 6.0.4 do not support
ibss mode, and only support the older demo ad-hoc mode.
o Note that PRISM2 chipsets do not support WDS mode of operation
(the mysterious -p 2 option).
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