* eval_error.h (error_handle): no message when exiting by signal.
* intern.h (rb_thread_signal_raise, ruby_default_signal): prototypes.
* signal.c (esignal_init): takes a signal number and an optional
signal name.
* signal.c (interrupt_init): pass SIGINT always.
* signal.c (ruby_default_signal): invoke system default signal
handler.
* signal.c (rb_f_kill): use NUM2PIDT instead of NUM2INT.
* signal.c (rb_signal_exec, trap): handle SIGTERM. [ruby-dev:30505]
* thread.c (rb_thread_signal_raise): now takes signal number instead
of signal name.
* thread.c (rb_thread_signal_exit): since rb_make_exception() calls
#exception method, rb_class_new_instance() is not needed here.
* yarvcore.h (struct rb_vm_struct), eval_jump.h (terminate_process):
exit_code is no longer stored in VM.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12199 b2dd03c8-39d4-4d8f-98ff-823fe69b080e