Limit the maximal read buffer space that is used for every socket

CSocket caches the data read from a socket and then looks for lines in there.
If there is no line end, this buffer can grow quite large. This patch now
closes sockets if they get a huge read buffer.


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1233 726aef4b-f618-498e-8847-2d620e286838

DCCBounce.h

@@ -43,6 +43,7 @@ public:
 		m_sRemoteIP = sRemoteIP;
 		m_bIsRemote = false;
 
+		SetMaxBufferThreshold(10240);
 		if (bIsChat) {
 			EnableReadLine();
 		}
@@ -56,6 +57,7 @@ public:
 	virtual void ReadPaused();
 	virtual void Timeout();
 	virtual void ConnectionRefused();
+	virtual void ReachedMaxBuffer();
 	virtual void SockError(int iErrno);
 	virtual void Connected();
 	virtual void Disconnected();