* 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/pseudo-reloc.cc

@@ -328,10 +328,10 @@ do_pseudo_reloc (void * start, void * end, void * base)
 }
 
 #ifdef __CYGWIN__
-void
+extern "C" void
 _pei386_runtime_relocator (per_process *u)
 {
-  if (CYGWIN_VERSION_USE_PSEUDO_RELOC_IN_DLL (u))
+  if (u && CYGWIN_VERSION_USE_PSEUDO_RELOC_IN_DLL (u))
     do_pseudo_reloc (u->pseudo_reloc_start, u->pseudo_reloc_end, u->image_base);
 }
 #else