Clean up BMCWEB_ENABLE_SSL

This macro came originally from CROW_ENABLE_SSL, and was used as a macro
to optionally compile without openssl being required.

OpenSSL has been pulled into many other dependencies, and has been
functionally required to be included for a long time, so there's no
reason to hold onto this macro.

Remove most uses of the macro, and for the couple functional places the
macro is used, transition to a constexpr if to enable the TLS paths.

This allows a large simplification of code in some places.

Tested: Redfish service validator passes.

Change-Id: Iebd46a68e5e417b6031479e24be3c21bef782f4c
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/http/routing/websocketrule.hpp b/http/routing/websocketrule.hpp
index bf6daad..b52d9ec 100644
--- a/http/routing/websocketrule.hpp
+++ b/http/routing/websocketrule.hpp
@@ -27,7 +27,6 @@
         asyncResp->res.result(boost::beast::http::status::not_found);
     }
 
-#ifndef BMCWEB_ENABLE_SSL
     void handleUpgrade(const Request& req,
                        const std::shared_ptr<bmcweb::AsyncResp>& /*asyncResp*/,
                        boost::asio::ip::tcp::socket&& adaptor) override
@@ -41,7 +40,7 @@
                 messageHandler, messageExHandler, closeHandler, errorHandler);
         myConnection->start(req);
     }
-#else
+
     void handleUpgrade(const Request& req,
                        const std::shared_ptr<bmcweb::AsyncResp>& /*asyncResp*/,
                        boost::beast::ssl_stream<boost::asio::ip::tcp::socket>&&
@@ -56,7 +55,6 @@
                 messageHandler, messageExHandler, closeHandler, errorHandler);
         myConnection->start(req);
     }
-#endif
 
     template <typename Func>
     self_t& onopen(Func f)