* Added a new discovery flag IEEE80211_MESHRT_FLAGS_DISCOVER;
* Modified ieee80211_ioctl.h to include IEEE80211_MESHRT_FLAGS_DISCOVER;
* Added hwmp_rediscover_cb, which will be called by a timeout to do
rediscovery if we have not reach max number of preq discovery;
* Modified hwmp_discover to setup a callout for path rediscovery;
* Added to ieee80211req_mesh_route to have a back pointer to ieee80211vap
for the discovery callout context;
* Modified mesh_rt_add_locked arguemnt from ieee80211_mesh_state to
ieee80211vap, this because we have to initialize the above back pointer;
Approved by: adrian
47451c661b