Windows: update openssl + fix ucrt

[jeroen]

Sync build with the openssl package, cf jeroen/openssl@7749563

[codecov-commenter]

Codecov Report

Merging #122 (f5e0c44) into master (9ee2b01) will not change coverage.
The diff coverage is n/a.

❗ Current head f5e0c44 differs from pull request most recent head f7816fd. Consider uploading reports for the commit f7816fd to get more accurate results

@@           Coverage Diff           @@
##           master     #122   +/-   ##
=======================================
  Coverage   94.04%   94.04%           
=======================================
  Files          40       40           
  Lines        2987     2987           
=======================================
  Hits         2809     2809           
  Misses        178      178           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9ee2b01...f7816fd. Read the comment docs.

[jeroen]

OK this is good to go now. I also had to refactor the Makevars file a little bit, additional benefit will be that the compiler can now better optimize this.

[paleolimbot]

Thank you!