Add protocol support to WebSocketClient

[emsi]

Some websocket servers require protocol for proper communication.
This changes adds the possibility to set the Sec-WebSocket-Protocol header while upgrading connection.
The change should be 100% backward compatible.

[CLAassistant]

All committers have signed the CLA.

[github-actions]

Memory usage change @ 56772a0

Board	flash	%	RAM for global variables	%
arduino:samd:mkr1000	🔺 0 - +48	0.0 - +0.02	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/BasicAuthGet flash	%	examples/BasicAuthGet RAM for global variables	%	examples/CustomHeader flash	%	examples/CustomHeader RAM for global variables	%	examples/DweetGet flash	%	examples/DweetGet RAM for global variables	%	examples/DweetPost flash	%	examples/DweetPost RAM for global variables	%	examples/HueBlink flash	%	examples/HueBlink RAM for global variables	%	examples/PostWithHeaders flash	%	examples/PostWithHeaders RAM for global variables	%	examples/SimpleDelete flash	%	examples/SimpleDelete RAM for global variables	%	examples/SimpleGet flash	%	examples/SimpleGet RAM for global variables	%	examples/SimpleHttpExample flash	%	examples/SimpleHttpExample RAM for global variables	%	examples/SimplePost flash	%	examples/SimplePost RAM for global variables	%	examples/SimplePut flash	%	examples/SimplePut RAM for global variables	%	examples/SimpleWebSocket flash	%	examples/SimpleWebSocket RAM for global variables	%
arduino:samd:mkr1000	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	48	0.02	0	0.0

Click for full report CSV

Board,examples/BasicAuthGet<br>flash,%,examples/BasicAuthGet<br>RAM for global variables,%,examples/CustomHeader<br>flash,%,examples/CustomHeader<br>RAM for global variables,%,examples/DweetGet<br>flash,%,examples/DweetGet<br>RAM for global variables,%,examples/DweetPost<br>flash,%,examples/DweetPost<br>RAM for global variables,%,examples/HueBlink<br>flash,%,examples/HueBlink<br>RAM for global variables,%,examples/PostWithHeaders<br>flash,%,examples/PostWithHeaders<br>RAM for global variables,%,examples/SimpleDelete<br>flash,%,examples/SimpleDelete<br>RAM for global variables,%,examples/SimpleGet<br>flash,%,examples/SimpleGet<br>RAM for global variables,%,examples/SimpleHttpExample<br>flash,%,examples/SimpleHttpExample<br>RAM for global variables,%,examples/SimplePost<br>flash,%,examples/SimplePost<br>RAM for global variables,%,examples/SimplePut<br>flash,%,examples/SimplePut<br>RAM for global variables,%,examples/SimpleWebSocket<br>flash,%,examples/SimpleWebSocket<br>RAM for global variables,%
arduino:samd:mkr1000,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,48,0.02,0,0.0

[github-actions]

Memory usage change @ a56163f

Board	flash	%	RAM for global variables	%
arduino:samd:mkr1000	🔺 0 - +48	0.0 - +0.02	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/BasicAuthGet flash	%	examples/BasicAuthGet RAM for global variables	%	examples/CustomHeader flash	%	examples/CustomHeader RAM for global variables	%	examples/DweetGet flash	%	examples/DweetGet RAM for global variables	%	examples/DweetPost flash	%	examples/DweetPost RAM for global variables	%	examples/HueBlink flash	%	examples/HueBlink RAM for global variables	%	examples/PostWithHeaders flash	%	examples/PostWithHeaders RAM for global variables	%	examples/SimpleDelete flash	%	examples/SimpleDelete RAM for global variables	%	examples/SimpleGet flash	%	examples/SimpleGet RAM for global variables	%	examples/SimpleHttpExample flash	%	examples/SimpleHttpExample RAM for global variables	%	examples/SimplePost flash	%	examples/SimplePost RAM for global variables	%	examples/SimplePut flash	%	examples/SimplePut RAM for global variables	%	examples/SimpleWebSocket flash	%	examples/SimpleWebSocket RAM for global variables	%
arduino:samd:mkr1000	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	48	0.02	0	0.0

Click for full report CSV

Board,examples/BasicAuthGet<br>flash,%,examples/BasicAuthGet<br>RAM for global variables,%,examples/CustomHeader<br>flash,%,examples/CustomHeader<br>RAM for global variables,%,examples/DweetGet<br>flash,%,examples/DweetGet<br>RAM for global variables,%,examples/DweetPost<br>flash,%,examples/DweetPost<br>RAM for global variables,%,examples/HueBlink<br>flash,%,examples/HueBlink<br>RAM for global variables,%,examples/PostWithHeaders<br>flash,%,examples/PostWithHeaders<br>RAM for global variables,%,examples/SimpleDelete<br>flash,%,examples/SimpleDelete<br>RAM for global variables,%,examples/SimpleGet<br>flash,%,examples/SimpleGet<br>RAM for global variables,%,examples/SimpleHttpExample<br>flash,%,examples/SimpleHttpExample<br>RAM for global variables,%,examples/SimplePost<br>flash,%,examples/SimplePost<br>RAM for global variables,%,examples/SimplePut<br>flash,%,examples/SimplePut<br>RAM for global variables,%,examples/SimpleWebSocket<br>flash,%,examples/SimpleWebSocket<br>RAM for global variables,%
arduino:samd:mkr1000,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,48,0.02,0,0.0