config: new domains.cfg to configure openid realm

Or other realmy types...

src/api2/access/domain.rs

@@ -38,10 +38,31 @@ use crate::api2::types::*;
 )]
 /// Authentication domain/realm index.
 fn list_domains() -> Result<Value, Error> {
+
     let mut list = Vec::new();
+
     list.push(json!({ "realm": "pam", "comment": "Linux PAM standard authentication", "default": true }));
     list.push(json!({ "realm": "pbs", "comment": "Proxmox Backup authentication server" }));
+
+    let (config, _digest) = crate::config::domains::config()?;
+
+    for (realm, (section_type, v)) in config.sections.iter() {
+        let mut item = json!({
+            "type": section_type,
+            "realm": realm,
+        });
+
+        if v["comment"].as_str().is_some() {
+            item["comment"] = v["comment"].clone();
+        }
+        list.push(item);
+
+    }
+
     Ok(list.into())
+
+
+
 }
 
 pub const ROUTER: Router = Router::new()