* Makefile.in: Add some more optimization flags for cygwait, malloc and path. Explain

why -fomit-frame-pointer doesn't work right for passwd.o and path.o.  Add
-static to link command line for cygwin0.dll.
* fhandler_disk_file.cc (fhandler_disk_file::facl): Reorganize slightly to
silence compiler warning when compiling with -fstack-check.
* net.cc (inet_ntop6): Initialize structure members to silence compiler warning
when compiling with -fstack-check.
* pseudo-reloc.cc (_pei386_runtime_relocator): Make this a C function.  Detect
NULL u.
* winsup.h (_pei386_runtime_relocator): Declare this as extern "C".
* lib/_cygwin_crt0_common.cc (_pei386_runtime_relocator): Call with NULL
argument.
* signal.cc (sigaction_worker): Eliminate last argument.  Let callers report
their own strace info.  Regparmize.
(sigaction): Reflect sigaction_worker changes.
(siginterrupt): Ditto.
* exceptions.cc: Update copyright.

winsup/cygwin/fhandler_disk_file.cc

@@ -984,7 +984,6 @@ fhandler_disk_file::facl (int cmd, int nentries, __aclent32_t *aclbufp)
 cant_access_acl:
       switch (cmd)
 	{
-	  struct __stat64 st;
 
 	  case SETACL:
 	    /* Open for writing required to be able to set ctime
@@ -1000,6 +999,7 @@ cant_access_acl:
 	      set_errno (ENOSPC);
 	    else
 	      {
+		struct __stat64 st;
 		if (!fstat (&st))
 		  {
 		    aclbufp[0].a_type = USER_OBJ;