write nginx conf in diagnostic mode

compat/Cargo.lock

@@ -548,20 +548,6 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccaeedb56da03b09f598226e25e80088cb4cd25f316e6e4df7d695f0feeb1403"
 
-[[package]]
-name = "crossbeam"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ae5588f6b3c3cb05239e90bd110f257254aecd01e4635400391aeae07497845"
-dependencies = [
- "cfg-if",
- "crossbeam-channel",
- "crossbeam-deque",
- "crossbeam-epoch",
- "crossbeam-queue",
- "crossbeam-utils",
-]
-
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.1"
@@ -572,30 +558,6 @@ dependencies = [
  "crossbeam-utils",
 ]
 
-[[package]]
-name = "crossbeam-deque"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6455c0ca19f0d2fbf751b908d5c55c1f5cbc65e03c4225427254b46890bdde1e"
-dependencies = [
- "cfg-if",
- "crossbeam-epoch",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.9.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ec02e091aa634e2c3ada4a392989e7c3116673ef0ac5b72232439094d73b7fd"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
- "lazy_static",
- "memoffset",
- "scopeguard",
-]
-
 [[package]]
 name = "crossbeam-queue"
 version = "0.3.2"
@@ -1996,7 +1958,6 @@ dependencies = [
  "log",
  "nix 0.20.1",
  "patch-db-macro",
- "qutex-2",
  "serde",
  "serde_cbor 0.11.1",
  "serde_json",
@@ -2298,14 +2259,6 @@ dependencies = [
  "proc-macro2 1.0.29",
 ]
 
-[[package]]
-name = "qutex-2"
-version = "0.3.0"
-dependencies = [
- "crossbeam",
- "futures",
-]
-
 [[package]]
 name = "radium"
 version = "0.5.3"