ADDBAN <channel> [duration] <mask> <level> <reason>
{ 10} Adds a ban to chanserv
  <channel> : Channel to add ban to
  [duration]: Duration in minutes to keep ban for.
              0/Nonexistent for permanent ban
  <mask>    : nick!user@host mask to ban
  <level>   : Access level to place ban at
  <reason>  : Reason for ban
Only users with the given level of access can remove the ban.