Add log rotation logic

sync-server/Cargo.lock

@@ -991,6 +991,22 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
+[[package]]
+name = "humantime"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "135b12329e5e3ce057a9f972339ea52bc954fe1e9358ef27f95e89716fbc5424"
+
+[[package]]
+name = "humantime-serde"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57a3db5ea5923d99402c94e9feb261dc5ee9b4efa158b0315f788cf549cc200c"
+dependencies = [
+ "humantime",
+ "serde",
+]
+
 [[package]]
 name = "hyper"
 version = "1.5.1"
@@ -2314,6 +2330,7 @@ dependencies = [
  "clap",
  "clap-verbosity-flag",
  "futures",
+ "humantime-serde",
  "log",
  "rand 0.9.0",
  "reconcile-text",