Twisted: Send all available ircmsgs and reduce delay between checks

All ircmsgs that takeMsg will return should be processed each time
checkIrcForMsgs is called since there may be multiple available in the
fastqueue.

Reduced the time between calls of checkIrcForMsgs so the delay between
normally queued ircmsgs stays close to the configured throttleTime.

Closes: Sf#3018148
(cherry picked from commit adc5d62bbf)

src/drivers/Twisted.py

@@ -66,7 +66,7 @@ class SupyIrcProtocol(LineReceiver):
     delimiter = '\n'
     MAX_LENGTH = 1024
     def __init__(self):
-        self.mostRecentCall = reactor.callLater(1, self.checkIrcForMsgs)
+        self.mostRecentCall = reactor.callLater(0.1, self.checkIrcForMsgs)
 
     def lineReceived(self, line):
         msg = drivers.parseMsg(line)
@@ -76,9 +76,10 @@ class SupyIrcProtocol(LineReceiver):
     def checkIrcForMsgs(self):
         if self.connected:
             msg = self.irc.takeMsg()
-            if msg:
+            while msg:
                 self.transport.write(str(msg))
-        self.mostRecentCall = reactor.callLater(1, self.checkIrcForMsgs)
+                msg = self.irc.takeMsg()
+        self.mostRecentCall = reactor.callLater(0.1, self.checkIrcForMsgs)
 
     def connectionLost(self, r):
         self.mostRecentCall.cancel()