Add support for configuring allowed mentions per message or bot wide.

discord/state.py

@@ -39,6 +39,7 @@ from .guild import Guild
 from .activity import BaseActivity
 from .user import User, ClientUser
 from .emoji import Emoji
+from .mentions import AllowedMentions
 from .partial_emoji import PartialEmoji
 from .message import Message
 from .relationship import Relationship
@@ -78,6 +79,12 @@ class ConnectionState:
         self._fetch_offline = options.get('fetch_offline_members', True)
         self.heartbeat_timeout = options.get('heartbeat_timeout', 60.0)
         self.guild_subscriptions = options.get('guild_subscriptions', True)
+        mentions = options.get('mentions')
+
+        if mentions is not None and not isinstance(mentions, AllowedMentions):
+            raise TypeError('mentions parameter must be AllowedMentions')
+
+        self.mentions = mentions
         # Only disable cache if both fetch_offline and guild_subscriptions are off.
         self._cache_members = (self._fetch_offline or self.guild_subscriptions)
         self._listeners = []