refactor(devolutions-gateway): more doc comments;

Author: TheBestTvarynka

devolutions-gateway/src/config.rs

@@ -1104,11 +1104,24 @@ pub mod dto {
         pub password: String,
     }
 
-    /// Kerberos server config.
+    /// Kerberos server config
+    ///
+    /// This config is used to configure the kerberos server during RDP proxying.
     #[derive(PartialEq, Eq, Debug, Clone, Serialize, Deserialize)]
     pub struct KerberosServer {
+        /// The maximum allowed time difference between client and proxy clocks
+        ///
+        /// The value must be in seconds.
         pub max_time_skew: u64,
+        /// Ticket decryption key
+        ///
+        /// This key is used to decrypt the TGS ticket sent by the client. If you do not plan
+        /// to use Kerberos U2U authentication, then the `ticket_decryption_key' is required.
         pub ticket_decryption_key: Option<Vec<u8>>,
+        /// The domain user credentials for the Kerberos U2U authentication
+        ///
+        /// This field is needed only for Kerberos User-to-User authentication. If you do not plan
+        /// to use Kerberos U2U, do not specify it.
         pub service_user: Option<DomainUser>,
     }
 
@@ -1152,6 +1165,9 @@ pub mod dto {
         #[serde(default = "ws_keep_alive_interval_default_value")]
         pub ws_keep_alive_interval: u64,
 
+        /// Kerberos application server configuration
+        ///
+        /// It is used only during RDP proxying.
         pub kerberos_server: Option<KerberosServer>,
 
         /// Enable unstable features which may break at any point