Implement error conversion

[rubdos]

Currently, the Actix backend does not implement error conversion. We got the first crash in the wild, although the Whisperfish actor seemed to recover after that.

impl From<WsProtocolError> for AwcWebSocketError {
    fn from(e: WsProtocolError) -> AwcWebSocketError {
        todo!("error conversion {:?}", e)
        // return Some(Err(ServiceError::WsError {
        //     reason: e.to_string(),
        // }));
    }
}

[2021-12-22T14:27:25Z TRACE libsignal_service_actix::websocket] Triggering keep-alive
[2021-12-22T14:27:25Z TRACE libsignal_service::messagepipe] Sending request WebSocketRequestMessage { verb: Some("GET"), path: Some("/v1/keepalive"), body: None, headers: [], id: Some(1640183245225) }
[2021-12-22T14:27:25Z TRACE libsignal_service::messagepipe] request on route.
thread 'main' panicked at 'not yet implemented: error conversion Io(Kind(UnexpectedEof))', /home/mersdk/cargo/git/checkouts/libsignal-service-rs-57c3f8dab81a594f/49651bb/libsignal-service-actix/src/websocket.rs:47:9
stack backtrace:
   0:       0x5a74bf1f94 - std::backtrace_rs::backtrace::libunwind::trace::h4053ad6853eb3582
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
   1:       0x5a74bf1f94 - std::backtrace_rs::backtrace::trace_unsynchronized::h3cd99e1d7628b4b0
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:       0x5a74bf1f94 - std::sys_common::backtrace::_print_fmt::h3ca5dd6a1c61f5e2
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/sys_common/backtrace.rs:67:5
   3:       0x5a74bf1f94 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h9c15be0c4a0616a8
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/sys_common/backtrace.rs:46:22
   4:       0x5a74752d1c - core::fmt::write::he5c8b5c4e10fee36
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/core/src/fmt/mod.rs:1092:17
   5:       0x5a74bf1684 - std::io::Write::write_fmt::hb80c9754d7325278
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/io/mod.rs:1572:15
   6:       0x5a74bf0fb0 - std::sys_common::backtrace::_print::hf99a40a583c4b2ee
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/sys_common/backtrace.rs:49:5
   7:       0x5a74bf0fb0 - std::sys_common::backtrace::print::hf01f1c360c3f3281
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/sys_common/backtrace.rs:36:9
   8:       0x5a74bf0fb0 - std::panicking::default_hook::{{closure}}::he97a30ca46a3471d
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/panicking.rs:208:50
   9:       0x5a74bf03a0 - std::panicking::default_hook::h28e2b8725e916778
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/panicking.rs:225:9
  10:       0x5a74bf03a0 - std::panicking::rust_panic_with_hook::h381a1a1d878d983f
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/panicking.rs:591:17
  11:       0x5a74c0a238 - std::panicking::begin_panic_handler::{{closure}}::h3e441aa93da6512f
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/panicking.rs:497:13
  12:       0x5a74c0a1b4 - std::sys_common::backtrace::__rust_end_short_backtrace::h6bd7448eccdae96b
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/sys_common/backtrace.rs:141:18
  13:       0x5a74c0a168 - rust_begin_unwind
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/std/src/panicking.rs:493:5
  14:       0x5a74750e50 - core::panicking::panic_fmt::he8b3ba9c2f95546f
                               at /home/rsmet/rpmbuild/BUILD/rustc-1.52.1-src/library/core/src/panicking.rs:92:14
  15:       0x5a74a66658 - tokio::runtime::task::raw::poll::h94e25952ded6141d
  16:       0x5a74c36210 - tokio::task::local::LocalSet::tick::he6168425f2750c9d
  17:       0x5a74897600 - <futures_util::future::poll_fn::PollFn<F> as core::future::future::Future>::poll::h667069554f2a683a
  18:       0x5a74b10e70 - ProcessQtEvent
  19:       0x5a74d5b27c - _ZN5Waker11customEventEP6QEvent
                               at /home/mersdk/cargo/registry/src/github.aaakk.us.kg-1285ae84e5963aae/qmetaobject-0.2.5/src/future.rs:66:194
  20:       0x5a74d5b27c - _ZN5Waker11customEventEP6QEvent
                               at /home/mersdk/cargo/registry/src/github.aaakk.us.kg-1285ae84e5963aae/qmetaobject-0.2.5/src/future.rs:59:14
  21:       0x7d62ad8af0 - _ZN7QObject5eventEP6QEvent
  22:       0x7d62aae144 - _ZN16QCoreApplication6notifyEP7QObjectP6QEvent
  23:       0x7d62aae2e8 - _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent
  24:       0x7d62ab06b8 - _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData
  25:       0x7d62b00648 - <unknown>
  26:       0x7d60c0c234 - g_main_context_dispatch
  27:       0x7d60c0c4a0 - <unknown>
  28:       0x7d60c0c534 - g_main_context_iteration
  29:       0x7d62b00a90 - _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
  30:       0x7d62aac608 - _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE
  31:       0x7d62ab41d4 - _ZN16QCoreApplication4execEv
  32:       0x5a74887ec8 - qmeta_async::run::h6a7bebc2d3d1853f
  33:       0x5a74718e7c - harbour_whisperfish::main::hfc7c76c99c89e269
  34:       0x5a74a0770c - std::sys_common::backtrace::__rust_begin_short_backtrace::hd45e477692160929
  35:       0x5a7471a484 - main
  36:       0x7d6169311c - __libc_start_main
  37:       0x5a74716874 - <unknown>
[2021-12-22T14:28:10Z DEBUG libsignal_service::messagepipe] WebSocket stream ended.
[2021-12-22T14:28:10Z INFO  libsignal_service::messagepipe] Sink was closed. Reason: Ok(())
[2021-12-22T14:28:10Z DEBUG harbour_whisperfish::worker::client] Attempting reconnect
[2021-12-22T14:28:10Z TRACE libsignal_service_actix::websocket] Will start websocket at Url [REDACTED]