writeToStreamDataBlock() waited for the rest of a body for as long as
connected() held. A server that stops sending part way through a body
without closing the connection leaves connected() true, so getString()
never returned and the unit stopped responding. Give up after
_tcpTimeout without data and return HTTPC_ERROR_READ_TIMEOUT, as
handleHeaderResponse() already does. Same fix as arendst/Tasmota#25139.
`hostByName` does only return `1` on success, however it may return a negative value when lookup failed.
So need to check for the exact return value and not consider it a boolean return type.
Adam Matthews
TD-er