Add Bluetooth/PAN (personal area networking) commands.

Submitted by:	Cedric Gross <cg@cgross.info>
Remove unused PFTM_UNTIL_PACKET const.
Code logic of handling PFTM_PURGE into pf_find_state().
Add myself to the committers-src list and to the calendar.

Approved by:	rpaulo (mentor)
- Add manual pages for capability rights (rights(4)), cap_rights_init(3)
  family of functions and cap_rights_get(3) function.
- Update remaining Capsicum-related manual pages.

Reviewed by:	bdrewery
MFC after:	3 days
[automated] Merge in upstream-github/master