feat: add internal host detection support (#384)

Cargo.lock

@@ -889,6 +889,18 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bd0c93bb4b0c6d9b77f4435b0ae98c24d17f1c45b2ff844c6151a07256ca923b"
 
+[[package]]
+name = "dns-lookup"
+version = "2.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5766087c2235fec47fafa4cfecc81e494ee679d0fd4a59887ea0919bfb0e4fc"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "socket2",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "document-features"
 version = "0.2.8"
@@ -1424,6 +1436,7 @@ dependencies = [
  "base64 0.21.5",
  "chacha20poly1305",
  "clap",
+ "dns-lookup",
  "log",
  "md5",
  "open",