Add support for CONFIG REWRITE

[kender1314]

Hi, I called the setConfig method in the RedisConnection class to modify some configurations, but I did not find the config rewrite command. It seems that this command is not supported. Will this command be supported in the future? How do I write the modified config into the configuration file now?
Thanks.

[kender1314]

@mp911de

[kender1314]

Hello，anyone there?

[mp911de]

Good catch. Feel free to submit a pull request to add this method.