hook
addr
required:    false
scopable:    true
default:     The ipaddr resolved for the nodename.
Example:
addr = 1.2.3.4
The addr to use to connect a peer. Use scoping to define each non-default address.
command
required:    false
scopable:    false
convert:     shlex
The command to execute on selected events.
The program is fed the json-formatted event data through stdin.
events
required:    false
scopable:    false
convert:     list
The list of events to execute the hook command on.
The special value all is also supported.