wpa_supplicant/hostapd: Fix a number of manual page issues.

* If there were no content related change on a manual page, leave .Dd
  as it is. If there were content related change, change it to the date
  when it was changed in our tree, not when it was changed in FreeBSD
  or elsewhere.

* Comment out a number of references to manual pages which we don't
  have because the drivers have not yet been ported.

* Add .Mt back to email addresses.

* .Fx -> .Dx

* Typo fix.