Merge #301: core: support openssl 3

fc46e33 core: support openssl 3 (Vincenzo Palazzo)

Pull request description:

  In modern version of openssl (iirc from 1.1) the
  library `libeay32` is removed in favour of libcrypto.

  See for more info openssl/openssl#10332

  This commit adds the possibility to include libcrypto too

  Fixing the following error on a nix shell

  ```
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/_pytest/config/__init__.py:325: PluggyTeardownRaisedWarning: A plugin raised an exception during an old-style hookwrapper teardown. Plugin: helpconfig, Hook: pytest_cmdline_parse
  ConftestImportFailure: OSError: libeay32: cannot open shared object file: No such file or directory (from /home/vincent/gittea/work/lampo.rs/tests/lnprototest/tests/conftest.py) For more information see https://pluggy.readthedocs.io/en/stable/api_reference.html#pluggy.PluggyTeardownRaisedWarning
    config = pluginmanager.hook.pytest_cmdline_parse(
  ImportError while loading conftest '/home/vincent/gittea/work/lampo.rs/tests/lnprototest/tests/conftest.py'.
  tests/conftest.py:3: in <module>
      import lnprototest
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/lnprototest/__init__.py:15: in <module>
      from .event import (
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/lnprototest/event.py:16: in <module>
      from .namespace import namespace
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/lnprototest/namespace.py:6: in <module>
      from .signature import SigType
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/lnprototest/signature.py:5: in <module>
      from .utils import check_hex, privkey_expand
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/lnprototest/utils/__init__.py:18: in <module>
      from .bitcoin_utils import (
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/lnprototest/utils/bitcoin_utils.py:14: in <module>
      from bitcoin.wallet import CBitcoinSecret
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/bitcoin/wallet.py:23: in <module>
      import bitcoin.core.key
  /home/vincent/.cache/pypoetry/virtualenvs/lampo-lnprototest-IQvPSNpc-py3.11/lib/python3.11/site-packages/bitcoin/core/key.py:27: in <module>
      _ssl = ctypes.cdll.LoadLibrary(
  /nix/store/sxr2igfkwhxbagri49b8krmcqz168sim-python3-3.11.8/lib/python3.11/ctypes/__init__.py:454: in LoadLibrary
      return self._dlltype(name)
  /nix/store/sxr2igfkwhxbagri49b8krmcqz168sim-python3-3.11.8/lib/python3.11/ctypes/__init__.py:376: in __init__
      self._handle = _dlopen(self._name, mode)
  E   OSError: libeay32: cannot open shared object file: No such file or directory
  make[1]: *** [Makefile:11: check] Error 4
  ```

Top commit has no ACKs.

Tree-SHA512: a42bad5f66de3c7da5884d00e6016525df41e263a8169bdac0d82b08ab7934575b46ccf985f6c844808989c6919c753fb874177eab99c22aa7b6f1ab77c90422

Author: petertodd

bitcoin/core/key.py

@@ -26,6 +26,7 @@
 
 _ssl = ctypes.cdll.LoadLibrary(
     ctypes.util.find_library('ssl.35') or ctypes.util.find_library('ssl') or ctypes.util.find_library('libeay32')
+    or ctypes.cdll.LoadLibrary("libcrypto")
 )
 
 _libsecp256k1_path = ctypes.util.find_library('secp256k1')