chore: Fix clippy lints with minimal diff

Cargo.toml

@@ -867,7 +867,7 @@ unused-qualifications = "warn"
 #unused-results = "warn"                                             # TODO
 
 ## some sadness
-elided_named_lifetimes = "allow"                                     # TODO!
+mismatched_lifetime_syntaxes = "allow"                               # TODO!
 let_underscore_drop = "allow"
 missing_docs = "allow"
 # cfgs cannot be limited to expected cfgs or their de facto non-transitive/opt-in use-case e.g.
@@ -1006,3 +1006,6 @@ literal_string_with_formatting_args = { level = "allow", priority = 1 }
 
 
 needless_raw_string_hashes = "allow"
+
+# TODO: Enable this lint & fix all instances
+collapsible_if = "allow"

src/api/client/sync/v4.rs

@@ -45,6 +45,7 @@ use crate::{
 type TodoRooms = BTreeMap<OwnedRoomId, (BTreeSet<TypeStateKey>, usize, u64)>;
 const SINGLE_CONNECTION_SYNC: &str = "single_connection_sync";
 
+#[allow(clippy::cognitive_complexity)]
 /// POST `/_matrix/client/unstable/org.matrix.msc3575/sync`
 ///
 /// Sliding Sync endpoint (future endpoint: `/_matrix/client/v4/sync`)

src/core/config/mod.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::doc_link_with_quotes)]
 pub mod check;
 pub mod manager;
 pub mod proxy;

src/core/debug.rs

@@ -100,7 +100,7 @@ pub fn trap() {
 
 #[must_use]
 pub fn panic_str(p: &Box<dyn Any + Send>) -> &'static str {
-	p.downcast_ref::<&str>().copied().unwrap_or_default()
+	(**p).downcast_ref::<&str>().copied().unwrap_or_default()
 }
 
 #[inline(always)]

src/router/serve/unix.rs

@@ -30,7 +30,7 @@ use tower::{Service, ServiceExt};
 
 type MakeService = IntoMakeServiceWithConnectInfo<Router, net::SocketAddr>;
 
-const NULL_ADDR: net::SocketAddr = net::SocketAddr::new(IpAddr::V4(Ipv4Addr::new(0, 0, 0, 0)), 0);
+const NULL_ADDR: net::SocketAddr = net::SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 0);
 const FINI_POLL_INTERVAL: Duration = Duration::from_millis(750);
 
 #[tracing::instrument(skip_all, level = "debug")]