Update to OpenSSL3

[shawnlaffan]

See StrawberryPerl/Perl-Dist-Strawberry#132

As noted there, the MSYS2 project have patches available that can be adapted if needed: https://github.com/msys2/MSYS2-packages/tree/master/openssl

[shawnlaffan]

MSYS2 are patching in some relocation code.
https://github.com/msys2/MINGW-packages/tree/c4ad0f681fdbe6979016a8355a585061f05c4262/mingw-w64-openssl

Should we be doing the same? It might help with cases such as in StrawberryPerl/Perl-Dist-Strawberry#51

[shawnlaffan]

I just had a go at using the relocation patches. The patch applies and the pathtools files can be copied across.

However, the build errors quickly as it needs libcrypto to also be built using the pathtools files.

Edit - the main patch is also ifdefed to only apply to __MINGW32__, e.g. https://github.com/msys2/MINGW-packages/blob/258f6e303f1e4c29b794ecc55517c2c030b3220c/mingw-w64-openssl/002-relocation.patch#L15

I'll leave this open for now but will probably open a separate issue at a later date as the title of this issue has been dealt with.