Refactoring continues:

* Initialize the file system early, prior to DD_StartupWorker
  Obviously no resource locator, virtual files, vdmaps, etc...,
  are present yet, however this allows the lower level functionality
  to be used a little sooner.
* Replaced filehandle_t with filelist_node_t - all file handles
  and both file lists (opened and loaded) now use the same set
  of objects and bookkeeping routines.
* Recycle used filelist nodes rather than allocating more.
* Block allocate filelist nodes in batches of 64 nodes.
* Fixed logic error resulting in files loaded into the auxiliary
  LumpDirectory were being marked as "startup" resources.
* Cleanup.

doomsday/engine/portable/src/dd_main.c

@@ -1431,9 +1431,10 @@ int DD_Main(void)
         }}
     }
 
+    // Initialize the subsystems needed prior to entering busy mode for the first time.
     Sys_Init();
+    F_Init();
 
-    // Initialize the subsystems needed prior to entering busy mode.
     Fonts_Init();
     if(!isDedicated)
     {
@@ -1640,7 +1641,6 @@ static void DD_InitResourceSystem(void)
 {
     Con_Message("Initializing Resource subsystem...\n");
 
-    F_Init();
     F_InitResourceLocator();
     F_CreateNamespacesForFileResourcePaths();
     F_InitVirtualDirectoryMappings();