Delete header vs unsetHttpHeader vs unsetHeader

[mal-risma]

Calling deleteHeader gives an error because it tries to call unsetHttpHeader, but the function was renamed to unsetHeader.

It doesn't matter in my tests if I call unsetHttpHeader or deleteHeader as I always endup in the deleteHeader function in InnerBrowser.

The error is pretty obvious from this commit:

66f06c9

I would make a PR, but I'm not sure what the correct fix is?
Rename unsetHeader to unsetHttpHeader or just call unsetHeader instead of unsetHttpHeader from the deleteHeader function?

[Naktibalda]

Fixed in 4.0.5