- New `LIBSSH2_DLL_SUFFIX` envvar will add a suffix to the generated
libssh2 dll name. Useful to add `-x64` to 64-bit builds so that
it can live in the same directory as the 32-bit one. By default
this is empty.
- New `LIBSSH2_DLL_A_SUFFIX` envvar to customize the suffix of the
generated import library (implib) for libssh2 .dll. It defaults
to `dll`, and it's useful to modify that to `.dll` to have the
standard naming scheme for mingw-built .dlls, i.e. `libssh2.dll.a`.
Ref: aaa16f8025
Closes https://github.com/libssh2/libssh2/pull/215