Add GROUP creation permission to server_permission

db/newsgroup.sql

@@ -43,7 +43,8 @@ create table server_permission (
 insert into server_permission values
     (1, 'READ'),
     (2, 'POST'),
-    (3, 'KILL');
+    (3, 'KILL'),
+    (4, 'GROUP');
 
 create table server_user (
     id       INTEGER PRIMARY KEY NOT NULL,

lib/nntp/tiny/user.py

@@ -4,16 +4,18 @@ from nntp.tiny.db     import Database, DatabaseTable
 from nntp.tiny.passwd import compare
 
 class UserPermission(enum.Flag):
-    NONE = 0
-    READ = 1
-    POST = enum.auto()
-    KILL = enum.auto()
+    NONE  = 0
+    READ  = 1
+    POST  = enum.auto()
+    KILL  = enum.auto()
+    GROUP = enum.auto()
 
     def __str__(self):
         return {
             1: 'READ',
             2: 'POST',
-            3: 'KILL'
+            3: 'KILL',
+            4: 'GROUP'
         }[self.value]
 
 class User(DatabaseTable):