* process.c (rb_fork_async_signal_safe): Inline rb_fork_internal.
  (rb_fork_ruby): Ditto.
  (rb_fork_internal): Removed.
  (chfunc_protect): Removed.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47355 b2dd03c8-39d4-4d8f-98ff-823fe69b080e