[esp8266] debug messages cleanup
[net] cosmetics
[esp8266] add tcp_connect/tcp_disconnect methods
[esp8266] fix buffered_serial_read to not return more than requested
[esp8266] bugfix: in case of char mismatch, retry matching to start of string
[esp8266] reset state machine before using it
[esp8266] allow specifying match ready size
[esp8266] allow infinite timeouts on sm_wait()
[esp8266] do not reset state machine on function exit. otherwise we can't call a new sm function from an sm function