Use resolver '3' for the workspace

Some important changes to how MSRV is handled were introduced in Rust
2024.

We need to switch to resolver version 3 in order to have access to
those changes. More information can be found in:
https://rust-lang.github.io/rfcs/3537-msrv-resolver.html

Switching resolvers sometimes require some code changes, which are
integrated in this commit as a result of running "cargo fix --edition"

Author: denisonbarbosa

Cargo.toml

@@ -1,7 +1,7 @@
 [workspace]
 members = ["nss/"]
 exclude = ["vendor_rust/", "authd-oidc-brokers/third_party/libhimmelblau/", "parts/libhimmelblau/build"]
-resolver = "2"
+resolver = "3"
 
 [profile.release]
 lto = "thin"

nss/src/logs/mod.rs

@@ -52,11 +52,12 @@ fn init_sys_logger(log_level: LevelFilter) {
         pid: std::process::id(),
     };
 
-    let logger = if let Ok(l) = syslog::unix(formatter) {
-        l
-    } else {
-        eprintln!("failed to create syslog logger");
-        return;
+    let logger = match syslog::unix(formatter) {
+        Ok(l) => l,
+        _ => {
+            eprintln!("failed to create syslog logger");
+            return;
+        }
     };
 
     if let Err(err) = log::set_boxed_logger(Box::new(BasicLogger::new(logger))) {