'man osd' won't help?

In D46528#1060772, @bz wrote:

The change looks okay.

I think describing the general problem in addition to the actual problem it causes would be good.

In D39568#900712, @bz wrote:

One note for both changes: you mention tables of the standard but do not say which version of the standard. You may want to add IEEE Std 802.11-XXXX with XXXX being the year of the standard you are referring to?

In D39476#899553, @adrian wrote:

oh wait err, i recall when bernard and i were debugging this in 2010/2011 time we found that "what the spec said" and "what devices actually needed because of bugs" were very different. so let's be careful with these.

(gosh I wish we had all of that in the commit logs or bug report logs somewhere..)

I wasn't able to find defines for these flags in ieee80211.h, but since they're used only in this context maybe we can use them as they're now, just with the comments nearby?