ei/mtg: Highly-opinionated (ex-bullshit-free) MTPROTO proxy for Telegram. If you use v1.0 or upgrade broke you proxy, please read the chapter Version 2

Highly-opinionated (ex-bullshit-free) MTPROTO proxy for Telegram. If you use v1.0 or upgrade broke you proxy, please read the chapter Version 2

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Alexey Dolotov eaff7007fd doctor: deepen DC verification with MTProto handshake probe Closes #494. After a successful TCP connect, run an unauthenticated req_pq_multi -> resPQ exchange via mtglib/dcprobe. This rejects generic listeners that happen to bind 443 but cannot speak MTProto. Output now shows "(rpc <rtt>)" on success; on failure the wrapped error distinguishes "tcp connect to ...: ..." from "rpc handshake to ...: ...". The probe runs by default — an opt-in flag would defeat the purpose, since the existing TCP-only check is what motivated the issue.		vor 4 Monaten
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cli	doctor: deepen DC verification with MTProto handshake probe	vor 4 Monaten
config	Make TCP_NOTSENT_LOWAT configurable	vor 4 Monaten
proxyprotocol	Add support of proxy protocol	vor 7 Monaten
testlib	Use native dialer to communicate with fronting domain	vor 6 Monaten
utils	Update to the latest golangci-lint	vor 7 Monaten