cargo: Cheap tricks for faster binaries

Signed-off-by: ATechnoHazard <amolele@gmail.com>

Cargo.toml

@@ -24,3 +24,8 @@ slog-async = "2.5.0"
 bcrypt = "0.8.0"
 chrono = "0.4.11"
 uuid = { version = "0.8.1", features = ["serde", "v4"] }
+
+[profile.release]
+lto = "fat"
+codegen-units = 1
+panic = "abort"