Windows CI fails: "fatal error C1083: Cannot open include file: 'openssl/evp.h': No such file or directory"

[sobolevn]

Bug report

Example: https://github.com/python/cpython/actions/runs/6076691980/job/16485108929

Output:

 D:\a\cpython\cpython\Modules\_hashopenssl.c(32,10): fatal  error C1083: Cannot open include file: 'openssl/evp.h': No such file or directory [D:\a\cpython\cpython\PCbuild\_hashlib.vcxproj]
D:\a\cpython\cpython\Modules\_ssl.h(5,10): fatal  error C1083: Cannot open include file: 'openssl/evp.h': No such file or directory [D:\a\cpython\cpython\PCbuild\_ssl.vcxproj]
  stream_buffer_decoder.c
  stream_buffer_encoder.c
  stream_decoder.c
  stream_encoder.c
  connection.c
  stream_encoder_mt.c
  cursor.c
  stream_flags_common.c
  stream_flags_decoder.c
  _tkinter.c
  microprotocols.c
  tkappinit.c
  stream_flags_encoder.c
  module.c
  vli_decoder.c
  prepare_protocol.c
  vli_encoder.c
  row.c
  vli_size.c
  statement.c
  util.c
  delta_common.c
  blob.c
  delta_decoder.c
  delta_encoder.c
  fastpos_table.c
  lzma2_decoder.c
  lzma2_encoder.c
     Creating library D:\a\cpython\cpython\PCbuild\amd64\_tkinter_d.lib and object D:\a\cpython\cpython\PCbuild\amd64\_tkinter_d.exp
  lzma_decoder.c
  lzma_encoder.c
  lzma_encoder_optimum_fast.c
     Creating library D:\a\cpython\cpython\PCbuild\amd64\_sqlite3_d.lib and object D:\a\cpython\cpython\PCbuild\amd64\_sqlite3_d.exp
  lzma_encoder_optimum_normal.c
  lzma_encoder_presets.c
  _tkinter.vcxproj -> D:\a\cpython\cpython\PCbuild\amd64\_tkinter_d.pyd
  lz_decoder.c
  lz_encoder.c
  lz_encoder_mf.c
  _sqlite3.vcxproj -> D:\a\cpython\cpython\PCbuild\amd64\_sqlite3_d.pyd
  price_table.c
  arm.c
  armthumb.c
  ia64.c
  powerpc.c
  simple_coder.c
  simple_decoder.c
  simple_encoder.c
  sparc.c
  x86.c
  liblzma.vcxproj -> D:\a\cpython\cpython\PCbuild\amd64\liblzma_d.lib
  _lzmamodule.c
     Creating library D:\a\cpython\cpython\PCbuild\amd64\_lzma_d.lib and object D:\a\cpython\cpython\PCbuild\amd64\_lzma_d.exp
  _lzma.vcxproj -> D:\a\cpython\cpython\PCbuild\amd64\_lzma_d.pyd

Build FAILED.

D:\a\cpython\cpython\Modules\_hashopenssl.c(32,10): fatal  error C1083: Cannot open include file: 'openssl/evp.h': No such file or directory [D:\a\cpython\cpython\PCbuild\_hashlib.vcxproj]
D:\a\cpython\cpython\Modules\_ssl.h(5,10): fatal  error C1083: Cannot open include file: 'openssl/evp.h': No such file or directory [D:\a\cpython\cpython\PCbuild\_ssl.vcxproj]

[zooba]

This is caused by network issues failing to download the OpenSSL packages. @ambv weren't you looking at this already?

PCbuild/get_external.py needs retry logic for the download step. And arguably we should make the entire build fail if any downloads fail, but that's harder to pipe through all the different batch files in use here.