Re-add client connector param

This provides paths for users to handle two entirely seperate issues

- Alternative fix for #9870
- Allows handling of windows sslcontext issues without a global
truststore.inject_into_ssl() use

discord/client.py

@@ -249,6 +249,11 @@ class Client:
         set to is ``30.0`` seconds.
 
         .. versionadded:: 2.0
+    connector: Optional[:class:`aiohttp.BaseConnector`]
+        The aiohhtp connector to use for this client. This can be used to control underlying aiohttp
+        behavior, such as setting a dns resolver or sslcontext.
+
+        .. versionadded:: 2.5
 
     Attributes
     -----------
@@ -264,6 +269,7 @@ class Client:
         self.shard_id: Optional[int] = options.get('shard_id')
         self.shard_count: Optional[int] = options.get('shard_count')
 
+        connector: Optional[aiohttp.BaseConnector] = options.get('connector', None)
         proxy: Optional[str] = options.pop('proxy', None)
         proxy_auth: Optional[aiohttp.BasicAuth] = options.pop('proxy_auth', None)
         unsync_clock: bool = options.pop('assume_unsync_clock', True)
@@ -271,6 +277,7 @@ class Client:
         max_ratelimit_timeout: Optional[float] = options.pop('max_ratelimit_timeout', None)
         self.http: HTTPClient = HTTPClient(
             self.loop,
+            connector,
             proxy=proxy,
             proxy_auth=proxy_auth,
             unsync_clock=unsync_clock,