enable struct_excessive_bools lint

And ignore it in the one place it fires, I know.

Cargo.toml

@@ -75,6 +75,7 @@ string_add = "warn"
 string_lit_chars_any = "warn"
 string_slice = "warn"
 string_to_string = "warn"
+struct_excessive_bools = "warn"
 suspicious_xor_used_as_pow = "warn"
 tests_outside_test_module = "warn"
 try_err = "warn"

src/config.rs

@@ -13,6 +13,7 @@ mod proxy;
 
 use self::proxy::ProxyConfig;
 
+#[allow(clippy::struct_excessive_bools)]
 #[derive(Clone, Debug, Deserialize)]
 pub(crate) struct Config {
     #[serde(default = "default_address")]