Version 7.81 breaks support for multi-line header

[Olivier Gayot]

In curl 7.81, the support of multi-line headers is broken.

This causes regressions in python-tornado:

```
                    self.stop()

            timeout_handle = self.add_timeout(self.time() + timeout, timeout_callback)
        self.start()
        if timeout is not None:
            self.remove_timeout(timeout_handle)
        assert future_cell[0] is not None
        if future_cell[0].cancelled() or not future_cell[0].done():
            raise TimeoutError("Operation timed out after %s seconds" % timeout)
> return future_cell[0].result()
E tornado.curl_httpclient.CurlError: HTTP 599: Header without colon
```

[Olivier Gayot (ogayot)]

Bug report in tornado: https://github.com/tornadoweb/tornado/issues/3143
Bug report in curl: https://github.com/curl/curl/issues/8844

A fixed was merged upstream in curl.

[Olivier Gayot (ogayot)]

Adding debdiff (applied upstream patch).
Will forward to Debian.

[Sebastien Bacher (seb128)]

Thanks Olivier, I sponsored the change now

[Launchpad Janitor (janitor)]

This bug was fixed in the package curl - 7.83.1-1ubuntu1

---------------
curl (7.83.1-1ubuntu1) kinetic; urgency=medium

  * Apply upstream patch to fix multi-line header support (LP: #1976619)

 -- Olivier Gayot <email address hidden> Thu, 02 Jun 2022 13:44:50 +0200

[Olivier Gayot (ogayot)]

Marking python-tornado as invalid since there is nothing to fix in the package itself.