Simpler password validation

tests.py

@@ -4271,14 +4271,6 @@ def _testGetLinksFromContent():
     assert '>@linked</a>' in content
 
 
-def _testValidPassword():
-    print('testValidPassword')
-    assert not validPassword('123')
-    assert not validPassword('')
-    assert not validPassword('Abcdefg1?23456')
-    assert validPassword('Abcdef!g123456')
-
-
 def _testAuthorizeSharedItems():
     print('testAuthorizeSharedItems')
     sharedItemsFederatedDomains = \
@@ -4328,6 +4320,15 @@ def _testDateConversions() -> None:
     assert dateStr == dateStr2
 
 
+def _testValidPassword():
+    print('testValidPassword')
+    assert not validPassword('123')
+    assert not validPassword('')
+    assert validPassword('パスワード12345')
+    assert validPassword('测试密码12345')
+    assert validPassword('A!bc:defg1/234?56')
+
+
 def runAllTests():
     print('Running tests...')
     updateDefaultThemesList(os.getcwd())

utils.py

@@ -2641,8 +2641,6 @@ def validPassword(password: str) -> bool:
     """
     if len(password) < 8:
         return False
-    if not re.match("^[a-zA-Z0-9!]*$", password):
-        return False
     return True
 
 

webapp_login.py

@@ -176,8 +176,8 @@ def htmlLogin(cssCache: {}, translate: {},
         '    <label for="password"><b>' + \
         translate['Password'] + '</b></label>\n' + \
         '    <input type="password" ' + autocompleteStr + \
-        ' placeholder="' + translate['Enter Password'] + ' A-Za-z0-9" ' + \
+        ' placeholder="' + translate['Enter Password'] + '" ' + \
-        'pattern="[A-Za-z0-9!]{8,}" name="password" required>\n' + \
+        'pattern="{8,}" name="password" required>\n' + \
         loginButtonStr + registerButtonStr + '\n' + \
         '  </div>\n' + \
         '</form>\n' + \