shift file streaming layer to using async layer for background work, remove file stream layer thread pool

src/base/base_core.h

@@ -214,7 +214,7 @@
 # define ins_atomic_ptr_eval_assign(x,c)        (void*)ins_atomic_u32_eval_assign((volatile U32 *)(x), (U32)(c))
 # define ins_atomic_ptr_eval(x)                 (void*)ins_atomic_u32_eval((volatile U32 *)x)
 #else
-# error Atomic intrinsics for pointers not defined for this achitecture.
+# error Atomic intrinsics for pointers not defined for this architecture.
 #endif
 
 ////////////////////////////////

src/base/base_entry_point.c

@@ -27,6 +27,9 @@ main_thread_base_entry_point(void (*entry_point)(CmdLine *cmdline), char **argum
   }
   
   //- rjf: initialize all included layers
+#if defined(ASYNC_H) && !defined(ASYNC_INIT_MANUAL)
+  async_init();
+#endif
 #if defined(TASK_SYSTEM_H) && !defined(TS_INIT_MANUAL)
   ts_init();
 #endif