+g (allow any member to /invite)
+z (send messages blocked by +m to chanops)
+parameters: target, any...
+The command name should be three decimal ASCII digits.
+Propagates a "numeric" command reply, such as from a remote WHOIS request.
+If the first digit is 0 (indicating a reply about the local connection), it
+should be changed to 1 before propagation or sending to a user.
+Numerics to the local server may be sent to opers.
+To avoid infinite loops, servers should not send any replies to numerics.
+ propagation: one-to-one
+ propagation: all servers with -D users on the channel
+Numerics to channels are broken in some older servers.