Replace Boost.Dll with our own function

Now we no longer rely on anything from Boost. Later we'll move the path
detection to the very beginning of the plugin bridge initialization so
it can be set from the coming chainloader libraries.

src/plugin/bridges/common.h

@@ -29,6 +29,9 @@
 #include "../../common/utils.h"
 #include "../host-process.h"
 
+// FIXME: This should be passed as an argument instead
+#include "../../common/linking.h"
+
 /**
  * If the amount of lockable memory is below this, then we'll warn about it
  * during startup. Otherwise we may run into issues when mapping shared memory
@@ -73,9 +76,8 @@ class PluginBridge {
      * @throw std::runtime_error Thrown when the Wine plugin host could not be
      *   found, or if it could not locate and load a VST3 module.
      */
-    template <invocable_returning<TSockets,
-                                  asio::io_context&,
-                                  const PluginInfo&> F>
+    template <
+        invocable_returning<TSockets, asio::io_context&, const PluginInfo&> F>
     PluginBridge(PluginType plugin_type, F&& create_socket_instance)
         // This is still correct for VST3 plugins because we can configure an
         // entire directory (the module's bundle) at once