---
fixes:
  - |
    Bug 1766235_: Handle HTTP headers per RFC 8187

    Previously the glanceclient encoded HTTP headers as UTF-8
    bytes.  According to `RFC 8187`_, however, headers should be
    encoded as 7-bit ASCII.  The glanceclient now sends all headers
    as 7-bit ASCII.  It handles unicode strings by percent-encoding_
    them before sending them in headers.

    .. _1766235: https://code.launchpad.net/bugs/1766235
    .. _RFC 8187: https://tools.ietf.org/html/rfc8187
    .. _percent-encoding: https://tools.ietf.org/html/rfc3986#section-2.1