[NEW]: seen.c unrealircd module

Module Request: seen.c

Description:

Adds /SEEN command for seen lookups on nicknames.

Syntax:

/SEEN <nickname>

Examples:

/SEEN westor

It will reply back the LAST event from the given nickname.

irc.server.com *** westor (ident@vhost) [real-ip] has joined on #channel at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has parted from #channel at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has talked on #channel at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has been quitted at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has been connected at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has changed nickname to westor-new at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has been kicked from #channel by Syzop at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has been banned from #channel by Syzop at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has changed modes on #channel at 21/04/2021 19:48:55
irc.server.com *** westor (ident@vhost) [real-ip] has changed topic on #channel at 21/04/2021 19:48:55