use true_fn for startup_netburst option

Signed-off-by: strawberry <strawberry@puppygock.gay>

Cargo.lock

@@ -445,6 +445,7 @@ dependencies = [
  "ipaddress",
  "itertools 0.12.1",
  "jsonwebtoken",
+ "log",
  "lru-cache",
  "nix",
  "num_cpus",

src/config/mod.rs

@@ -226,7 +226,7 @@ pub struct Config {
 	#[serde(with = "serde_regex")]
 	pub forbidden_usernames: RegexSet,
 
-	#[serde(default = "default_startup_netburst")]
+	#[serde(default = "true_fn")]
 	pub startup_netburst: bool,
 
 	#[serde(default)]
@@ -679,5 +679,3 @@ fn default_url_preview_max_spider_size() -> usize {
 }
 
 fn default_new_user_displayname_suffix() -> String { "🏳️‍⚧️".to_owned() }
-
-fn default_startup_netburst() -> bool { true }