Ssl param in client

[asvetlov]

Implementation for #2626

[codecov-io]

Codecov Report

Merging #2628 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2628      +/-   ##
==========================================
+ Coverage   97.91%   97.92%   +<.01%     
==========================================
  Files          38       38              
  Lines        7257     7261       +4     
  Branches     1259     1260       +1     
==========================================
+ Hits         7106     7110       +4     
  Misses         47       47              
  Partials      104      104

Impacted Files	Coverage Δ
aiohttp/client_reqrep.py	97.36% <100%> (+0.13%)	⬆️
aiohttp/connector.py	96.82% <100%> (-0.13%)	⬇️

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[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