add program argument for functional testing; simplify execute argument

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

src/core/config/mod.rs

@@ -1,5 +1,5 @@
 use std::{
-	collections::BTreeMap,
+	collections::{BTreeMap, BTreeSet},
 	fmt,
 	net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr},
 	path::PathBuf,
@@ -361,6 +361,9 @@ pub struct Config {
 	#[serde(default)]
 	pub tokio_console: bool,
 
+	#[serde(default)]
+	pub test: BTreeSet<String>,
+
 	#[serde(flatten)]
 	#[allow(clippy::zero_sized_map_values)] // this is a catchall, the map shouldn't be zero at runtime
 	catchall: BTreeMap<String, IgnoredAny>,