Auto-generate the allowed list of values for enum/set/flagset options
in --help output. But don't do that when the help text already has them.
Also, remove lists of values from help strings of various options, where
they were simply listed without any additional information.
The task is to
(a) add a comment on indexes and
(b) increase the maximum length of column, table and the new index comments.
The patch committed on behalf of Yoshinori Matsunobu (Yoshinori.Matsunobu@Sun.COM).
conflicts:
Text conflict in mysql-test/suite/sys_vars/r/rpl_max_binlog_size_func.result
Text conflict in mysql-test/suite/sys_vars/t/rpl_max_binlog_size_func.test