text: // Definitions of POP3 commands (RFC 1939)
  
  // Server-side Status Indicators.
  POP3_CMD_DEF(OK)
  POP3_CMD_DEF(ERR)
  
  // ===========================================
  // AUTHORIZATION - State
  
  POP3_CMD_DEF(USER)
  POP3_CMD_DEF(PASS)
  
  // Additional commands (not required to be implemented).
  
  POP3_CMD_DEF(APOP)
  POP3_CMD_DEF(AUTH)
  
  // POP3_CMD_DEF(QUIT) - also possible here, but without entering UPDATE-state.
  
  // ===========================================
  // TRANSACTION - State
  
  POP3_CMD_DEF(STAT)
  POP3_CMD_DEF(LIST)
  POP3_CMD_DEF(RETR)
  POP3_CMD_DEF(DELE)
  POP3_CMD_DEF(RSET)
  POP3_CMD_DEF(NOOP)
  POP3_CMD_DEF(LAST)
  POP3_CMD_DEF(QUIT)
  
  // Additional commands (not required to be implemented).
  
  POP3_CMD_DEF(TOP)
  POP3_CMD_DEF(CAPA)
  POP3_CMD_DEF(UIDL)
  POP3_CMD_DEF(STLS)
  POP3_CMD_DEF(XSENDER)
  
  POP3_CMD_DEF(END)
  
  // ===========================================
  // UPDATE - State
  // no commands here
  
  