Extend thread-related debug messages.
All interior pointers must be enabled for finalized allocation.

* include/gc_disclaim.h: Add note about all-interior-pointers requirement.
* fnlz_mlc.c (GC_init_finalized_malloc): Abort with a useful message if all
interior pointers are not enabled.
* tests/disclaim_bench.c, tests/disclaim_test.c: Enable all interior
pointers for tests.
Move finalizer closure to the end of objects.

* fnlz_mlc.c: Move finalizer closure for finalized object kinds to the end
of objects.  This way, we don't require all interior pointers, and GC_base
returns the expected address.
* tests/disclaim_test.c: Improve test coverage.
Remove closure data from GC_register_disclaim_proc.

* include/gc_disclaim.h, fnlz_mlc.c (GC_disclaim_proc, GC_register_disclaim_proc):
Remove CD from typedef and function.
* reclaim.c (GC_reclaim_uninit, GC_reclaim_block): Adjust calls.
* include/private/gc_priv.h, misc.c: Remove CD from object kind struct and
initializers.
Export GC_push manipulation functions and function pointer.

* include/private/gc_priv.h, include/gc_mark.h: Move GC_push_all,
GC_push_conditional and GC_push_other_roots to a public header and adjust
prototypes and comment.
* mark.c, os_dep.c: Adjust prototypes accordingly.
Replace exit(1) with EXIT call in catch_exception_raise (code refactoring)

* os_dep.c (catch_exception_raise): Replace exit(EXIT_FAILURE) call
with EXIT() macro call.
Segregated exit and abort hooks changes into their own branch
Added getters for exit and abort callback hooks.
Added documentation to abort and exit callback hook declarations.
Segregated suspend/restart signal init changes into their own branch.
Better handling in signal setter/getter of non-signal-using OSes.
Call GC_on_abort (with NULL argument) on exit(1)

* include/private/gc_priv.h (EXIT): Call GC_on_abort(NULL) before
exit(1) (unless PCR) enabling the collector to enter a tight loop
(for debugging purpose) on abnormal EXIT if "GC_LOOP_ON_ABORT"
environment variable is set.
* misc.c (GC_on_abort): Allow "msg" argument to be NULL (skip
printing the message in such a case); update comment.
Turn off GC_LOOP_ON_ABORT functionality if GC compiled with NO_DEBUGGING

* misc.c (looping_handler, installed_looping_handler): Do not define
if NO_DEBUGGING.
* misc.c (maybe_install_looping_handler): Define as an empty macro if
NO_DEBUGGING.
* misc.c (GC_on_abort): Do not test "GC_LOOP_ON_ABORT" environment
variable if GC_LOOP_ON_ABORT.
Add public GC_set/get_abort_func to replace default GC_on_abort

* include/gc.h (GC_abort_func): New public typedef.
* include/gc.h (GC_set_abort_func, GC_get_abort_func): New API
function declaration.
* include/private/gc_priv.h (GC_on_abort): Change function
declaration to function pointer of GC_abort_func type (only if
SMALL_CONFIG and not PCR).
* misc.c (GC_on_abort): Rename to GC_default_on_abort; make it STATIC
and decorate with GC_CALLBACK; define GC_on_abort variable initialized
to GC_default_on_abort (only if SMALL_CONFIG and not PCR).
* misc.c (GC_set_abort_func, GC_get_abort_func): New public function
(only if if SMALL_CONFIG and not PCR) to alter and read GC_on_abort
value.
Dummy merge branch 'jcbeaudoin/exit_abort_hooks'
(superseded by functionality added in commit d020903)
Update ChangeLog file
Update ChangeLog file
Merge branch 'add-abort-exit-setters'
Update ChangeLog file
Extend new suspend/restart signal macro redirection to other OSes beyond Linux.