fix various nightly incidental lints

Signed-off-by: Jason Volk <jason@zemos.net>

Cargo.toml

@@ -801,7 +801,7 @@ perf = { level = "warn", priority = -1 }
 ###################
 #restriction = "warn"
 
-allow_attributes = "warn"
+#allow_attributes = "warn"                                           # UNSTABLE
 arithmetic_side_effects = "warn"
 as_conversions = "warn"
 as_underscore = "warn"

src/core/pdu/mod.rs

@@ -119,7 +119,7 @@ impl PduEvent {
 		// deliberately allowing for the possibility of negative age
 		let now: i128 = MilliSecondsSinceUnixEpoch::now().get().into();
 		let then: i128 = self.origin_server_ts.into();
-		let this_age: i128 = now.saturating_sub(then);
+		let this_age = now.saturating_sub(then);
 
 		unsigned.insert("age".to_owned(), to_raw_value(&this_age).unwrap());
 		self.unsigned = Some(to_raw_value(&unsigned).expect("unsigned is valid"));

src/service/resolver/actual.rs

@@ -189,7 +189,7 @@ impl super::Service {
 			.services
 			.client
 			.well_known
-			.get(&format!("https://{dest}/.well-known/matrix/server"))
+			.get(format!("https://{dest}/.well-known/matrix/server"))
 			.send()
 			.await;