[VojtaM39]

What

forward() and forwardSocks() used new Promise(async (resolve, reject) => ...). A synchronous throw inside
the executor (e.g. http.request throwing ERR_INVALID_IP_ADDRESS when prepareRequestFunction returns an
invalid localAddress) became an unhandled rejection, which crashes the process on Node >= 15, and the outer
promise never settled so the client request hung.

How

Executors are now synchronous. A throw rejects the promise, Server.onRequest catches it, the client gets a 500
and requestFailed is emitted.

Tests

Added e2e test returns 500 when forward() throws synchronously. It fails on master (unhandled rejection +
hang).

[bliuchak]

Good catch!