The `update_user_option()` function is a way to update a user meta value after adding a blog’s prefix to the beginning of the meta key. But when the fourth parameter is `true`, the behavior is exactly the same as calling `update_user_meta()` directly.
This replaces all instances of `update_user_option()` when the fourth parameter is `true` in Core with a direct call to `update_user_meta()` to prevent an unnecessary call to `update_user_option()`.
Props johnjamesjacoby, zkancs, obenland, desrosj.
Fixes#43339.
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git-svn-id: http://core.svn.wordpress.org/trunk@50590 1a063a9b-81f0-0310-95a4-ce76da25c4cd