Add send_proxy_v2 option to send HAProxy header to server

Cargo.lock

@@ -391,6 +391,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "doc-comment"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"
+
 [[package]]
 name = "dotenv"
 version = "0.15.0"
@@ -771,6 +777,7 @@ dependencies = [
  "named-binary-tag",
  "notify",
  "pretty_env_logger",
+ "proxy-protocol",
  "quartz_nbt",
  "rand 0.8.4",
  "rcon",
@@ -1090,6 +1097,16 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "proxy-protocol"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e50c72c21c738f5c5f350cc33640aee30bf7cd20f9d9da20ed41bce2671d532"
+dependencies = [
+ "bytes",
+ "snafu",
+]
+
 [[package]]
 name = "quartz_nbt"
 version = "0.2.4"
@@ -1394,6 +1411,27 @@ version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9def91fd1e018fe007022791f865d0ccc9b3a0d5001e01aabb8b40e46000afb5"
 
+[[package]]
+name = "snafu"
+version = "0.6.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eab12d3c261b2308b0d80c26fffb58d17eba81a4be97890101f416b478c79ca7"
+dependencies = [
+ "doc-comment",
+ "snafu-derive",
+]
+
+[[package]]
+name = "snafu-derive"
+version = "0.6.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1508efa03c362e23817f96cde18abed596a25219a8b2c66e8db33c03543d315b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "socket2"
 version = "0.4.2"