* dll_init.cc: Revert pathname changes from 2012-02-08.

(dll_list::operator[]): Add long comment to explain the misery.
	(dll_list::alloc): Skip long pathname prefix potentially returned by
	GetModuleFileNameW.
	* dll_init.h (dll_list::find_by_modname): Add back declaration.

winsup/cygwin/dll_init.h

@@ -90,6 +90,7 @@ public:
   void load_after_fork (HANDLE);
   void reserve_space ();
   void load_after_fork_impl (HANDLE, dll* which, int retries);
+  dll *find_by_modname (const PWCHAR name);
   void populate_deps (dll* d);
   void topsort ();
   void topsort_visit (dll* d, bool goto_tail);