forked from espressif/arduino-esp32
* Support concatenation of headers (as in 1de0c341b5 (diff-977435a9cc4619fa0b8b995085f6ae683485cf563722756bab57108b362da316)
for ESP8266, fixes https://github.com/espressif/arduino-esp32/issues/4069)
* Add support for receiving, storing and sending cookies (cookie jar)
* Cookie support: Respect `secure` attribute when sending a request
* Fix missing `_secure` flag
* Comment out support concatenation of headers (not needed anymore when using cookie jar)