Add hCaptcha support.

src/util/mod.rs

@@ -2,6 +2,8 @@ use hashbrown::HashSet;
 use rand::{distributions::Alphanumeric, Rng};
 use std::iter::FromIterator;
 
+pub mod captcha;
+
 pub fn vec_to_set<T: Clone + Eq + std::hash::Hash>(data: &[T]) -> HashSet<T> {
     HashSet::from_iter(data.iter().cloned())
 }