TODO: Add TODOs
TelnetClient.php: start replacing \r and \n by NVT_CR and NVT_LF
TelnetClient.php: Cosmetic fix
TelnetClient.php: Add FIXME
TelnetClient.php: Current work, to be reviewed
TelnetClient.php: First stab at a state machine (WIP)
TelnetClient.php: Remove readTo() and negotiateTelnetOptions() in favour of waitForData()
TelnetClient.php: Use waitForData() in waitPrompt()
TelnetClient.php: Comment fixes
TelnetClient.php: Split ctor and connect(), add connect_timeout parameter
TelnetClient.php: Comment fix
TelnetClient.php: Rewrite dubious/weird conditions
TelnetClient.php: Use upstream's case convention
TelnetClient.php: Remove unused variable
TelnetClient.php: Use distinguish connect_timeout and socket_timeout
TelnetClient.php: Use upstream's convention for PHP special scalar values
TelnetClient.php: Do not wait for the prompt in connect()
TelnetClient.php: Remove setStreamTimeout()
TelnetClient.php: Don't add characters to the global_buffer in asyncGetc()

We don't want option characters and what not in the buffer
TelnetClient.php: Make clearBuffer() private

Is has no use to a user