* util.c (ruby_each_words): extracted from ruby_set_debug_option().

* ruby.c (proc_options): generalized enable/disable options.

* ruby.c (ruby_init_gems): take enabled flag.  [ruby-core:14840]

* ruby.c (process_options): added --disable-rubyopt flag.

* include/ruby/util.h (ruby_each_words): prototype.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15590 b2dd03c8-39d4-4d8f-98ff-823fe69b080e