Log Message:
py-h11: updated to 0.11.0

v0.11.0

New features:

* h11 now stores and makes available the raw header name as
  received. In addition h11 will write out header names with the same
  casing as passed to it. This allows compatibility with systems that
  expect titlecased header names.
* Multiple content length headers are now merged into a single header
  if all the values are equal, if any are unequal a LocalProtocol
  error is raised (as before).

Backwards **in**\compatible changes:

* Headers added by h11, rather than passed to it, now have titlecased
  names. Whilst this should help compatibility it replaces the
  previous lowercased header names.