http-kit/http-kit — pull request #106 by christianromney (2014-01-16 14:54:13+00:00)
Title: Fixed :multipart clobbering Authorization, User-Agent headers

Supplying the :multipart option caused a conditional branch
in coerce-req to be followed which failed to retain the work
done by prepare-request-headers earlier in the function.

The association of the new Content-Type value was also
simplified by using assoc-in. Added a test for the private
coerce-req to expose the issue and verify the fix.

Signed-off-by: Christian Romney