K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2016-07-15T15:12:56.935732Z
K 7
svn:log
V 541
Add documentation for the sigevent structure.

- Add a sigevent(3) manpage to give a general overview of the sigevent
  structure and the available notification mechanisms.
- Document that AIO requests contain a nested sigevent structure that can
  be used to request completion notification.
- Expand the sigevent details in other manuals to note details such as
  the extra values stored in a queued signal's information or in a posted
  kevent.

Reviewed by:	kib
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D7122

END