server: don't use parking_lot explicitly anymore

As of Rust 1.62, standard locks will recieve a massive performance
improvement (speed and memory footprint) on Linux.

parking_lot seems to be still be better [1] for the ordinary usecase
but I will still remove it preemptively for 2 reasons:

1. The application isn't still usable, I don't have any benchmarks where
   parking_lot is needed because of critical locks causing a noticable
   bottleneck. (I doubt it will be case anyway)

2. Having a smaller explicit dependency chain is good for
   maintainability. (Don't take this too far as to reduce usability
   though)

Tokio still uses parking_lot by default in itself.
Maybe I'll get rid of it after bumping MSRV to 1.62.

[1]: https://twitter.com/m_ou_se/status/1526220580361490438

Cargo.lock

@@ -169,7 +169,6 @@ dependencies = [
  "axum",
  "blake2",
  "clap",
- "parking_lot",
  "rand",
  "rusqlite",
  "serde",
@@ -422,9 +421,9 @@ checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
 [[package]]
 name = "hyper"
-version = "0.14.18"
+version = "0.14.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b26ae0a80afebe130861d90abf98e3814a4f28a4c6ffeb5ab8ebb2be311e0ef2"
+checksum = "42dc3c131584288d375f2d07f822b0cb012d8c6fb899a5b9fdb3cb7eb9b6004f"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -446,9 +445,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "1.8.1"
+version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f647032dfaa1f8b6dc29bd3edb7bbef4861b8b8007ebb118d6db284fd59f6ee"
+checksum = "e6012d540c5baa3589337a98ce73408de9b5a25ec9fc2c6fd6be8f0d39e0ca5a"
 dependencies = [
  "autocfg",
  "hashbrown",
@@ -571,9 +570,9 @@ checksum = "21326818e99cfe6ce1e524c2a805c189a99b5ae555a35d19f9a284b427d86afa"
 
 [[package]]
 name = "parking_lot"
-version = "0.12.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87f5ec2493a61ac0506c0f4199f99070cbe83857b0337006a30f3e6719b8ef58"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
 dependencies = [
  "lock_api",
  "parking_lot_core",
@@ -1064,7 +1063,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4bc28f93baff38037f64e6f43d34cfa1605f27a49c34e8a04c5e78b0babf2596"
 dependencies = [
  "ansi_term",
- "parking_lot",
  "sharded-slab",
  "smallvec",
  "thread_local",

Cargo.toml

@@ -12,14 +12,13 @@ argon2 = "0.4"
 blake2 = "0.10"
 axum = { version = "0.5", features = ["http2"] }
 clap = { version = "3.1", features = ["derive"] }
-parking_lot = "0.12"
 rand = "0.8"
 rusqlite = { version = "0.27", features = ["serde_json", "time", "uuid"] }
 serde = { version = "1", features = ["derive"] }
 time = { version = "0.3", features = ["serde"] }
 tokio = { version = "1.18", features = ["full"] }
 tracing = "0.1"
-tracing-subscriber = { version = "0.3", features = ["parking_lot"] }
+tracing-subscriber = "0.3"
 uuid = { version = "1", features = ["v4", "serde"] }
 
 [profile.release]

src/main.rs

@@ -6,10 +6,10 @@ mod server;
 use std::collections::HashMap;
 use std::option::Option;
 use std::process::{ExitCode, Termination};
+use std::sync::RwLock;
 
 use anyhow::Result;
 use clap::{Parser, Subcommand};
-use parking_lot::RwLock;
 
 pub type CsrfMap = RwLock<HashMap<String, String>>;