SSL_in_*_init macros

[justsmth]

Description of changes:

Provide functions SSL_in_connect_init and SSL_in_accept_init.

Call-outs:

Function definitions match OpenSSL macros: https://github.com/openssl/openssl/blob/a3fc812c0c78e2f5db8b9d45bddaff62dfc958ae/include/openssl/ssl.h#L1071-L1073

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 78.73%. Comparing base (b1420f2) to head (e64eb51).

Files with missing lines	Patch %	Lines
ssl/ssl_lib.cc	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2302   +/-   ##
=======================================
  Coverage   78.72%   78.73%           
=======================================
  Files         616      616           
  Lines      107584   107588    +4     
  Branches    15286    15285    -1     
=======================================
+ Hits        84700    84712   +12     
+ Misses      22230    22220   -10     
- Partials      654      656    +2     

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