From e51b511fedad2c86ac3d0c9c10ddd523421b6e66 Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@freedombone.net>
Date: Fri, 30 Jul 2021 12:23:42 +0100
Subject: [PATCH] Don't confuse nicknames for people and groups

---
 utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils.py b/utils.py
index e70657ca4..89ef4970b 100644
--- a/utils.py
+++ b/utils.py
@@ -1619,7 +1619,7 @@ def validNickname(domain: str, nickname: str) -> bool:
         return False
     if not isValidLanguage(nickname):
         return False
-    forbiddenChars = ('.', ' ', '/', '?', ':', ';', '@', '#')
+    forbiddenChars = ('.', ' ', '/', '?', ':', ';', '@', '#', '!')
     for c in forbiddenChars:
         if c in nickname:
             return False