Allow non standard cert dir

ixwebsocket/CMakeLists.txt

@@ -64,8 +64,7 @@ elseif(UNIX)
     target_compile_definitions(ixwebsocket PRIVATE
         IXWEBSOCKET_USE_TLS
         IXWEBSOCKET_USE_OPEN_SSL
-        SSL_CERT_DIR=/etc/ssl/certs
-        SSL_CERT_FILE=/etc/ssl/cert.pem
+        IXWEBSOCKET_OPEN_SSL_CERTS="/etc/ssl/certs/"
     )
     target_compile_options(ixwebsocket PRIVATE
         -nodefaultlibs
@@ -96,6 +95,7 @@ elseif(WIN32)
     target_compile_definitions(ixwebsocket PRIVATE
         IXWEBSOCKET_USE_TLS
         IXWEBSOCKET_USE_OPEN_SSL
+        IXWEBSOCKET_OPEN_SSL_CERTS=NULL
     )
     if(DEBUG)
         target_compile_options(ixwebsocket PRIVATE