Fix use of config-specific libraries for Windows OpenSSL

Fix use of config-specific libraries for Windows OpenSSL

Commit 614350a3 allowed for an different builds of OpenSSL libraries on
Windows, but ignored the fact that the alternative builds don't have
config-specific libraries. This patch fixes the Solution file to ask for
the correct libraries.

per offline discussions with Leonardo Cecchi and Marco Nenciarini,

Backpatch to all live branches.