support quic proxy (#993)

QUIC proxy works like kcp proxy, it can proxy TCP streams and transfer data with QUIC.
QUIC has better congestion algorithm (BBR) for network with both high loss rate and high bandwidth. 
QUIC proxy can be enabled by passing `--enable-quic-proxy` to easytier in the client side. The proxy status can be viewed by `easytier-cli proxy`.

.github/workflows/core.yml

@@ -175,14 +175,14 @@ jobs:
           fi
 
           if [[ $OS =~ ^ubuntu.*$ && $TARGET =~ ^mips.*$ ]]; then
-            cargo +nightly build -r --verbose --target $TARGET -Z build-std=std,panic_abort --no-default-features --features mips --package=easytier
+            cargo +nightly build -r --target $TARGET -Z build-std=std,panic_abort --package=easytier
           else
             if [[ $OS =~ ^windows.*$ ]]; then
               SUFFIX=.exe
             fi
-            cargo build --release --verbose --target $TARGET --package=easytier-web --features=embed
+            cargo build --release --target $TARGET --package=easytier-web --features=embed
             mv ./target/$TARGET/release/easytier-web"$SUFFIX" ./target/$TARGET/release/easytier-web-embed"$SUFFIX"
-            cargo build --release --verbose --target $TARGET
+            cargo build --release --target $TARGET
           fi
 
       # Copied and slightly modified from @lmq8267 (https://github.com/lmq8267)

.github/workflows/test.yml

@@ -91,6 +91,7 @@ jobs:
 
       - name: Run tests
         run: |
-          sudo -E env "PATH=$PATH" cargo test --no-default-features --features=full --verbose -- --test-threads=1 --nocapture
+          sudo prlimit --pid $$ --nofile=1048576:1048576
+          sudo -E env "PATH=$PATH" cargo test --no-default-features --features=full --verbose -- --test-threads=1
           sudo chown -R $USER:$USER ./target
           sudo chown -R $USER:$USER ~/.cargo