1. it links with ${SSL_LIBRARIES}, in WolfSSL builds it's a static
   library, so when a plugin is loaded there will be two copies of
   wolfssl in the same address space. It breaks odr (at least).
2. Plugin can linked with OpenSSL and the server with WolfSSL or
   vice versa. It might load, but then we'll have both WolfSSL and
   OpenSSL at the same time. Kind of risky.

Fix: link the plugin statically into the server if it's a WolfSSL build

adjust tests to work with static and dynamic parsec