Document for rb_obj_methods, etc

e$B:G6a!"e(B

No definition for rb_obj_methods
No definition for rb_obj_protected_methods
No definition for rb_obj_private_methods
No definition for rb_obj_public_methods

e$B$H$$$&%a%C%;!<%8$,A}2C$7$F$$$^$9!#e(B
rdoc e$B$,%I%-%e%a%s%H$r8+$D$1$i$l$F$$$J$$$N$G$O$J$$$+$H;W$$$^$9!#e(B

http://www.rubyist.net/~akr/chkbuild/debian/ruby-trunk/log/20100618T040900.diff.txt.gz