Documentation for ClientSession

[mrcarv]

trust_env constructor parameter for ClientSession incorrectly described in the docs. Doesn't show in the signature and in the parameters description shows as from_env

[asvetlov]

Fixed by 6e53ed4
Thanks for report.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a [new issue] for related bugs.
If you feel like there's important points made in this discussion, please include those exceprts into that [new issue].
[new issue]: https://github.com/aio-libs/aiohttp/issues/new