🐛Quick Tunnel will ALWAYS use QUIC protocol instead of auto

[wzxjohn]

Describe the bug
Quick tunnel's default protocol has been set to QUIC instead of auto.

To Reproduce
Run cloudflared tunnel --url http://127.0.0.1

Expected behavior
Use auto as default protocol
https://developers.cloudflare.com/cloudflare-one/networks/connectors/cloudflare-tunnel/configure-tunnels/run-parameters/#protocol

Environment and versions

• Version: 2026.3.0

Additional context

cloudflared/cmd/cloudflared/tunnel/quick_tunnel.go

Lines 86 to 88 in d2a87e9

	if !sc.c.IsSet(flags.Protocol) {
	_ = sc.c.Set(flags.Protocol, "quic")
	}