Minor changes

src/plugin.c

@@ -333,7 +333,7 @@ static int kplugin_sysrepo_init_session(kcontext_t *context)
 		sr_nacm_set_user(udata->sr_sess, user);
 	}
 
-	syslog(LOG_ERR, "Start session for \"%s\"", user);
+	syslog(LOG_ERR, "Start SysRepo session for \"%s\"", user);
 
 	return 0;
 }
@@ -358,7 +358,7 @@ static int kplugin_sysrepo_fini_session(kcontext_t *context)
 	}
 	sr_disconnect(udata->sr_conn);
 
-	syslog(LOG_ERR, "Stop session for \"%s\"", user);
+	syslog(LOG_ERR, "Stop SysRepo session for \"%s\"", user ? user : "<unknown>");
 
 	return 0;
 }