Since Windows 1903 update (which is now being rolled out), Pharo VM crashes on `libssh2-1.dll`.

Tested on P7 and P8 64bit with their respective VMs. 32bit seems to work.

Easiest way to reproduce is to try to fetch git repository over ssh, e.g.

``` Metacello new baseline: 'FileDialog'; repository: 'github://pharo-contributions/file-dialog/repository'; load. ```

This issue makes it impossible to use git over ssh. (Although I imagine switching to https should work as a temporary workaround.)

Windows crash log event:

``` Faulting application name: Pharo.exe, version: 5.0.0.0, time stamp: 0x00000000 Faulting module name: libssh2-1.dll, version: 0.0.0.0, time stamp: 0xaec0ae70 Exception code: 0xc0000005 Fault offset: 0x000000000001e6cb Faulting process id: 0x2c8 Faulting application start time: 0x01d5577ece35e5f5 Faulting application path: C:\Users\uhnak\Documents\Pharo\vms\80-x64\Pharo.exe Faulting module path: C:\Users\uhnak\Documents\Pharo\vms\80-x64\libssh2-1.dll Report Id: 60cbf9ad-b7a2-4f48-9831-e2cbc80e7734 Faulting package full name: Faulting package-relative application ID: ```

Is there a particular reason why we still use libssh2 1.7.0 (released 3 years ago), instead of a more recent one? https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/Cog/third-party/libss...

Dtto for libgit2 (0.25.1 released Jan 2017) https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/Cog/third-party/libgi...

Likely OpenSSL will also need to be updated as it is dependency of libssh2 https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/Cog/third-party/opens... Note that the current `1.0.2 LTS` ends at the end of the year and is replaced by `1.1.1 LTS` (until 2023 - https://www.openssl.org/policies/releasestrat.html )

I have also noticed that the Windows libssh Makefile doesn't contain code to download/unpack sources, unlike Linux and Mac

https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/Cog/build.win64x64/th... https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/Cog/build.linux64x64/... https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/Cog/build.macos64x64/...