POST/PATCH with body adds custom headers twice

[djmitchella]

If I do echo on, cd /api/things, set header my-header abcd, and then do:

GET

I can see my-header: abcd showing up once in the list of headers.

But if I try a POST with a body:

POST -c "hello"

then I get my-header: abcd twice in the list of headers, and if the API I'm talking to doesn't like duplicated headers, I get problems. If I don't supply a body, I don't get the duplicated header, it only shows up once.

Same problem happens with PATCH; if I supply a body, then my custom header gets sent twice.

[tlmii]

It looks like the headers are always getting added to the request's headers collection, and then, if there is a body, they're also getting added to the content's headers collection. Thus the duplication. Thanks for the bug report. I'll see about getting a PR out to fix this.