[Bug 50302] New: Invalid certificate is reported for test.winehq.com

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50302

Bug ID: 50302
           Summary: Invalid certificate is reported for test.winehq.com
           Product: WineHQ.org
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: www-unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Attempting to connect to https://test.winehq.com/ via Firefox yields a
warning that the certificate is invalid and self-signed.

This also seems to be causing the wininet:http tests to fail; see e.g.
https://test.winehq.org/data/76c9dbd4fb99f1257734908906c846a3c25ca77b/linux_cw-gtx560-t32/wininet:http.html.