* dll_init.h (struct dll): Re-add modname.

* dll_init.cc: Throughout, use modname where it was used before.
	(dll_list::operator[]): Use modname.  Move comment from dll_list::alloc
	here and remove hint about GetModuleBaseNameW.
	(dll_list::alloc): Store full path in name, pointer to basename in
	modname.  Search dll using modname.

winsup/cygwin/dll_init.h

@@ -56,6 +56,7 @@ struct dll
   dll** deps;
   DWORD image_size;
   void* preferred_base;
+  PWCHAR modname;
   WCHAR name[1];
   void detach ();
   int init ();