Do not force insert of root target.

Forcing the insert lead to false positives when you search for a invalid subdomain because there are not checks but just force the insert so, we never had a target with no subdomains found.

src/lib.rs

@@ -157,7 +157,6 @@ fn search_subdomains(args: &mut args::Args) -> HashSet<String> {
     ].into_iter().map(|j| j.join().unwrap()).collect::<Vec<_>>().into_iter().flatten().flatten().collect();
 
     all_subdomains.retain(|sub| misc::validate_subdomain(&base_target, &sub));
-    all_subdomains.insert(args.target.clone());
     all_subdomains
 }
 

src/misc.rs

@@ -215,7 +215,7 @@ pub fn return_facebook_token() -> String {
 pub fn validate_subdomain(base_target: &str, subdomain: &str) -> bool {
     !subdomain.is_empty()
         && !subdomain.starts_with('.')
-        && subdomain.ends_with(base_target)
+        && (subdomain.ends_with(base_target) || subdomain == args.target)
         && !subdomain.contains(&SPECIAL_CHARS[..])
         && subdomain.chars().all(|c| c.is_ascii())
 }