This defaults to 120 seconds. Debugging output is directed at standard output. Logged data is directed at standard output. This is a Posix-ism, and your machine may not support it. If no generation number is specified, the entry has generation number 0.
P defines a peer RWHO server.
Datagrams are formatted as a sequence of arguments, separated by tab characters. This clears the list of users accosicated with that mud. Z name password mudname userid deletes a user from the list of who's logged on to the specified mud. However, included in the RWHO distribution is a pseudo-mud, mwhocmd, that will send a datagram to an RWHO server. GronkMUD gronk comment to say that there is an ordniary MUD from which we should accept user data at 'host.site.dom', the mud is named 'GronkMUD', will be using the password 'gronk', and the comment attached to this MUD is simply the text 'comment'.