Irc: make throttle time configurable per server (defaults to 0.01s)

classes.py

@@ -172,7 +172,8 @@ class Irc():
             if self.queue:  # Only process if there's data.
                 data = self.queue.popleft()
                 self._send(data)
-            time.sleep(0.01)
+            throttle_time = self.serverdata.get('throttle_time', 0.01)
+            time.sleep(throttle_time)
 
     def connect(self):
         """

example-conf.yml

@@ -274,6 +274,11 @@ servers:
         # Autoconnect works like usual.
         autoconnect: 30
 
+        # Message throttling: when set to a non-zero value, only one message will be sent every X
+        # seconds. If your bot is constantly running into Excess Flood errors, raising this to
+        # something like 0.5 or 1.0 should help. Defaults to 0.01 if not set.
+        throttle_time: 0.3
+
 # Plugins to load (omit the .py extension)
 plugins:
     # Commands plugin: Provides core commands such as logging in, shutting down