WebSocket handshake test

Verify WebSocket upgrade handshake responds with 101

curl -i -N -H 'Upgrade: websocket' -H 'Connection: Upgrade' -H 'Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw==' -H 'Sec-WebSocket-Version: 13' http://localhost:8080/ws
tool
curl21 commands
tags
curlnetworkdebug

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all 21 curl commands