Default access log format is wrong

[fafhrd91]

It is still uses %u and %l

[asvetlov]

Actually it replaces both %u and %l to dashes.
I love to have fixed default format but we don't need bugfix release ASAP -- the behavior exists for two years :)

[fafhrd91]

just for bookkeeping

[asvetlov]

Aaah, ok

[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