K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2019-12-10T21:58:30.446584Z
K 7
svn:log
V 425
Add a callout_func_t typedef for functions used with callout_*().

This typedef is the same as timeout_t except that it is in the callout
namespace and header.

Use this typedef in various places of the callout implementation that
were either using the raw type or timeout_t.

While here, add <sys/callout.h> to the manpage.

Reviewed by:	kib, imp
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D22751

END