Zope2 and Products.ZCatalog both need name_trans for now.

We could copy the name_trans function to those packages instead,
but it seems fine to me to keep it here.

src/AccessControl/Permission.py

@@ -14,11 +14,19 @@
 """
 
 from Acquisition import aq_base
+import string
 import re
 
 _NOT_ALLOWED_CHARS = re.compile(r'[^a-zA-Z0-9_]')
 
 
+name_trans = filter(
+    lambda c,
+    an=string.letters + string.digits + '_': c not in an,
+    map(chr, range(256)))
+name_trans = string.maketrans(''.join(name_trans), '_' * len(name_trans))
+
+
 def getPermissionIdentifier(name):
     return '_' + re.sub(_NOT_ALLOWED_CHARS, '_', name) + "_Permission"