* upgrade to tokio v1.0
- removed tokio::prelude
- upgrade hyper to v0.14, tokio-rustls to v0.22
still working on migrating trust-dns-* and tokio-native-tls
ref #354
* tokio v1.0 removed with_poll
fix#355, ref #354
* removed CTRL-BREAK signal handler
ref #354
* fixes compliation error, add missing return
fixes#355
* allow setting SO_SNDBUF and SO_RCVBUF for sockets
ref #352
* completely removed unix socket based DNS resolving
ref shadowsocks/shadowsocks-android#2622
* fix build issue on Windows
* fixed uds poll_write loop, fixed udp outbound loopback check
ref #355
* disable default trust-dns resolver for andorid, macos, ios
This commit also:
- Optimized resolve() logging with elapsed time
- updated tokio-native-tls
* local-dns removed from default features
* fix rustc version with rust-toolchain
* Bump bytes from 0.6.0 to 1.0.0
* add dependabot badge
* indirectly depend on trust_dns_proto via trust_dns_resolver
* auto reconnect if udp sendto failed
* recreate proxied socket if recv() returns failure
* increase score precision to 0.0001
* example of log4rs configuration
* PingBalancer instance shouldn't kill probing task when dropping
- Probing task should be controlled by the internal shared state
* switch to trust-dns main for latest tokio 1.0 support
