Add integration test with localized HTTP reason phrase.

integration/hurl/tests_ok/reason.curl

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+curl 'http://localhost:8000/reason-french'

integration/hurl/tests_ok/reason.err.pattern

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+* ------------------------------------------------------------------------------
+* Executing entry 1
+*
+* Cookie store:
+*
+* Request:
+* GET http://localhost:8000/reason-french
+*
+* Request can be run with the following curl command:
+* curl 'http://localhost:8000/reason-french'
+*
+> GET /reason-french HTTP/1.1
+> Host: localhost:8000
+> Accept: */*
+> User-Agent: hurl/~~~
+>
+* Response: (received 7 bytes in ~~~ ms)
+*
+< HTTP/1.1 200 Succès
+< Server: Werkzeug/~~~ Python/~~~
+< Date: ~~~
+< Content-Type: text/html; charset=utf-8
+< Content-Length: 7
+< Server: Flask Server
+< Connection: close
+<
+*

integration/hurl/tests_ok/reason.hurl

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+# This file tests an HTTP endpoint that returns a localized HTTP reason phrase.
+# Some HTTP clients doesn't like it, curl does not care.
+GET http://localhost:8000/reason-french
+HTTP 200

integration/hurl/tests_ok/reason.out

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+Bonjour

integration/hurl/tests_ok/reason.ps1

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+Set-StrictMode -Version latest
+$ErrorActionPreference = 'Stop'
+hurl --verbose tests_ok/reason.hurl

integration/hurl/tests_ok/reason.py

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+from app import app
+
+
+@app.route("/reason-french")
+def reason_french():
+    return "Bonjour", "200 Succès"

integration/hurl/tests_ok/reason.sh

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+#!/bin/bash
+set -Eeuo pipefail
+hurl --verbose tests_ok/reason.hurl