Make force attr for ClientResponse.close() True by default

[asvetlov]

resp.close(force=False) is not safe: you should make sure that all response body has been read.
That can be done by yield from resp.release() call.
So let's change .close() to forcing close behavior. This simplifies response usage rules.

Appliying .close(force=False) should produce DeprecationWarning in next releases (say, until New Year). After that let's remove the parameter completely.

[fafhrd91]

is there other way to force close request socket?

[asvetlov]

@fafhrd91 except resp.close(force=True)? I'm not aware about alternatives.

[fafhrd91]

oh, i misunderstand description. +1

[asvetlov]

Done

[lock]

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