[bug] `mysqlopt` replace init config should ignore bar or underscore

[acekingke]

Describe the problem
after add interactive-timeout=3700 in mysqlopt field in yaml file,
the my.cnf has interactive_timeout=3600 and interactive-timeout=3700 together.

To Reproduce
as describe section.

Expected behavior
when interactive-timeout=3700 in mysqlopt field in yaml file, it must change interactive_timeout=3600
to interactive_timeout=3700

Environment:

• RadonDB MySQL version: v2.2.0