* cygheap.cc (cygheap_fixup_in_child): Call set_dll_dir.

(init_cygheap::init_installation_root): Just memmove contents of
	installation_root instead of calling GetModuleFileNameW again.
	Copy installation_root to installation_dir before stripping of
	"bin" dir.  Don't call SetDllDirectory here.  Explain what we do.
	(setup_cygheap): New function taking over initial cygheap setup
	from memory_init.  Additionally call set_dll_dir.
	* cygheap.h (struct init_cygheap): Add installation_dir member.
	(init_cygheap::set_dll_dir): Define.
	(setup_cygheap): Declare.
	* dcrt0.cc: Throughout drop parameter from memory_init call.
	(dll_crt0_0): Call setup_cygheap prior to memory_init.
	* dlfcn.cc (dlopen): Change comment to point to the right function.
	* shared.cc (memory_init): Drop parameter.  Drop cygheap setup.
	* shared_info.h (memory_init): Change declaration accordingly.

winsup/cygwin/shared_info.h

@@ -75,7 +75,7 @@ enum shared_locations
 
 };
 
-void __reg1 memory_init (bool);
+void memory_init ();
 void __stdcall shared_destroy ();
 
 #define shared_align_past(p) \