Config: Remove some legacy fields from V2Ray 3.x era#3776
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Dug out two undocumented config items from the code, and the archaeological analysis told they're from V2Ray-core 3.x (around 2018), and were brought into Xray-core since day one.
The removed config items are:
featuresunder VMess inbound config: This config item only contains a detour config which act as the same asdetourunder VMess inbound config, and should be deprecated as only thedetouris documented.domainOverrideunder inbound config: This is the one really deprecated as the sniffing config was introduced in V2Ray 3.x anddomainOverridegot quickly deprecated. When this is existed in the config it just turn on the sniffing config now, but it won't turn on QUIC sniffer and FakeDNS sniffer.Why they were here was just because in V2Ray-core each version of config format can be used for one main version, and can be used with the next main version for compatibility and migration, but V2Ray-core 4.x lasts unpredictably long and Xray-core inherited the config format from V2Ray-core 4.x, these old config codes just sitting there and being forgotten, like #2841 and #3163 and #3769.
Luckily there seems no more hidden undocumented configs that were deprecated and should be removed now. Those 3.x config items seems no need to be compatible for now in 2024 as 4.x format has spread for a very long time.