Fix log-facade logging

Previously, the log facade logger would always use a `logger` target but
then *also* add the correct module path and line as part of the normal
log messages. Here, we override the log target correctly.

Moreover, we previously would log all messages at the configured
*maximum* level, not the level in the log record.

src/logger.rs

@@ -143,26 +143,19 @@ impl LogWriter for Writer {
 					return;
 				}
 				macro_rules! log_with_level {
-					($log_level:expr, $($args:tt)*) => {
+					($log_level:expr, $target: expr, $($args:tt)*) => {
 						match $log_level {
-							LogLevel::Gossip | LogLevel::Trace => trace!($($args)*),
-							LogLevel::Debug => debug!($($args)*),
-							LogLevel::Info => info!($($args)*),
-							LogLevel::Warn => warn!($($args)*),
-							LogLevel::Error => error!($($args)*),
+							LogLevel::Gossip | LogLevel::Trace => trace!(target: $target, $($args)*),
+							LogLevel::Debug => debug!(target: $target, $($args)*),
+							LogLevel::Info => info!(target: $target, $($args)*),
+							LogLevel::Warn => warn!(target: $target, $($args)*),
+							LogLevel::Error => error!(target: $target, $($args)*),
 						}
 					};
 				}
 
-				log_with_level!(
-					max_log_level,
-					"{} {:<5} [{}:{}] {}",
-					Utc::now().format("%Y-%m-%d %H:%M:%S"),
-					record.level,
-					record.module_path,
-					record.line,
-					record.args
-				)
+				let target = format!("[{}:{}]", record.module_path, record.line);
+				log_with_level!(record.level, &target, " {}", record.args)
 			},
 			Writer::CustomWriter(custom_logger) => custom_logger.log(record),
 		}