My question is in the title :)
Topic on Extension talk:ShowRealUsernames/Archive 2
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Extension:Realnames may be what you are looking for, and it has just been updated to work with 1.31.1 LTS. (disclaimer: I am its author)
Extension:Realnames may be what you are looking for, and it has just been updated to work with 1.31.1 LTS. (disclaimer: I am its author)