Conversion codes notes
   I = int *arg IN/OUT 
   G = string GList **arg IN/OUT (list must be reconstructed)
   L = list of nicks

 Scalars
   s -> char *
   u -> ulong *
   I -> int *
   i -> int

 Lists of things (completion.c and massjoin.c) 
   G -> GList * of char* 
   L -> GSList of NICK_RECs

 Chat objects
   c -> CHATNET_REC
   S -> SERVER_REC
   C -> CHANNEL_REC
   q -> QUERY_REC
   n -> NICK_REC
   W -> WI_ITEM_REC

 Irssi objects
   d -> DCC_REC

 Other objects
   r -> RECONNECT_REC
   o -> COMMAND_REC
   l -> LOG_REC
   a -> RAWLOG_REC
   g -> IGNORE_REC
   ? -> MODULE_REC
   b -> BAN_REC
   N -> NETSPLIT_REC
   e -> NETSPLIT_SERVER_REC
   ? -> AUTOIGNORE_REC
   O -> NOTIFYLIST_REC
   ? -> THEME_REC
   ? -> KEYINFO_REC
   p -> PROCESS_REC
   t -> TEXT_DEST_REC
   w -> WINDOW_REC