feat: implement zero-downtime smooth reload and graceful shutdown using SO_REUSEPORT

Cargo.lock

@@ -1816,6 +1816,15 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "memoffset"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -1910,7 +1919,20 @@ dependencies = [
  "bitflags 1.3.2",
  "cfg-if",
  "libc",
- "memoffset",
+ "memoffset 0.6.5",
+]
+
+[[package]]
+name = "nix"
+version = "0.31.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "225e7cfe711e0ba79a68baeddb2982723e4235247aefce1482f2f16c27865b66"
+dependencies = [
+ "bitflags 2.10.0",
+ "cfg-if",
+ "cfg_aliases",
+ "libc",
+ "memoffset 0.9.1",
 ]
 
 [[package]]
@@ -2275,7 +2297,7 @@ dependencies = [
  "httpdate",
  "libc",
  "log",
- "nix",
+ "nix 0.24.3",
  "once_cell",
  "openssl-probe 0.1.6",
  "parking_lot",
@@ -3876,6 +3898,7 @@ dependencies = [
  "httparse",
  "ipnet",
  "libc",
+ "nix 0.31.1",
  "once_cell",
  "openssl",
  "pingora",