Log not found errors to the debug channel

They are part of normal operation and shouldn't be logged in production.

src/geoip.rs

@@ -3,9 +3,10 @@
  * that provides the results ready for templating.
  */
 
-use log::{info,warn,error};
+use log::{debug,info,warn,error};
 use maxminddb::geoip2;
 
+use maxminddb::MaxMindDBError::AddressNotFoundError;
 use parking_lot::RwLock;
 
 use std::collections::BTreeMap;
@@ -135,9 +136,15 @@ impl QueryAsn for MMDBCarrier {
 							name: res.autonomous_system_organization.map(ToString::to_string),
 						})
 					},
+					Err(AddressNotFoundError(_)) => {
+						// Log to the debug channel.
+						// This isn't severe, and shouldn't be logged in production.
+						debug!("ASN not found in database for {address}.");
+						None
+					},
 					Err(e) => {
 						error!("Error while looking up ASN for {address}: {e}");
-						Default::default()
+						None
 					}
 				}
 			},
@@ -203,9 +210,15 @@ impl QueryLocation for MMDBCarrier {
 							},
 						})
 					},
+					Err(AddressNotFoundError(_)) => {
+						// Log to the debug channel.
+						// This isn't severe, and shouldn't be logged in production.
+						debug!("IP location not found in database for {address}");
+						None
+					},
 					Err(e) => {
-						error!("Error while looking up ASN for {address}: {e}");
-						Default::default()
+						error!("Error while looking up IP location for {address}: {e}");
+						None
 					}
 				}
 			},

src/ipinfo.rs

@@ -111,6 +111,7 @@ impl AddressInfo {
 			scope: address_scope
 		}
 	}
+
 }