Pseudo TLS

[living42]

Hello, everyone.

I'm interested on porting the the idea from Cloak to gost. now i'm create this PR to see if there is a chance to merge it.

Notice this is a PoC, bug i'm planing to improve it, including:

1. generating ephemeral key for every connection
2. configurable encryption algorithm.
3. write some tests
4. (maybe) do some research about TLS, to see if we can make it more like normal TLS connection

Let me known what's your thought.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 694 lines in your changes missing coverage. Please review.

Project coverage is 47.07%. Comparing base (8ab2fe6) to head (4947074).
Report is 86 commits behind head on master.

Files with missing lines	Patch %	Lines
ptls.go	0.00%	693 Missing ⚠️
node.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #577      +/-   ##
==========================================
- Coverage   50.93%   47.07%   -3.86%     
==========================================
  Files          36       37       +1     
  Lines        8376     9072     +696     
==========================================
+ Hits         4266     4271       +5     
- Misses       3622     4314     +692     
+ Partials      488      487       -1     

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