help/opers/snomask

   1 MODE <nick> +s <+|-><modes>
   2
   3 Server notice masks:
   4
   5     SNOMASK     DESCRIPTION
   6 -----------------------------------------------------------------
   7        +b     - Possible bot warnings
   8        +c     - Local client connections and exits
   9        +C     - Extended local client connections and exits
  10        +d     - Server debug messages
  11        +f     - 'I-line is full' notices
  12        +k     - Server and service kill messages
  13        +n     - Local client nick changes
  14        +r     - 'Rejected' client notices
  15        +s     - Generic server messages and oper kills
  16        +u     - Unauthorised client connections
  17        +x     - New server introduction and split messages
  18        +y     - Juped channel join attempts, etc
  19        +Z     - Operspy notices