feat: As a user, I want to unify the keyring and key_encrypt_salt fields

[monkeyDluffy6017]

Description

As we can see, the keyring and the key_encrypt_salt are used in the same way and with the same meaning, so i suggest that if we could unify the keyring and key_encrypt_salt fields?

[luoluoyuyu]

I want to try it, please assign this issue to me

[luoluoyuyu]

hi @monkeyDluffy6017
I want to use key_encrypt_salt to configure encryption of ssl and plugin data, do we need to consider compatibility issues if the current user has configured key_encrypt_salt and keycring respectively and has done a version upgrade?

[monkeyDluffy6017]

1. Why not use keyring ?
2. no need to consider the compatbility, name your pr start with change:

[luoluoyuyu]

1. Why not use keyring ?
2. no need to consider the compatbility, name your pr start with change:

@monkeyDluffy6017 ，thanks for the suggestion, I found that there is more code to use keyring than key_encrypt_salt, using key_encrypt_salt the amount of code would be smaller.

[monkeyDluffy6017]

key_encrypt_salt is under the item ssl and not generic, keyring is better, and no need to consider the amount of code

[RitterHou]

I am trying to fix this issue, can you assign it to me? @monkeyDluffy6017