Fix copy ctor/assignment oper warnings of -Weffc++ (#270)

include/znc/Query.h

@@ -31,6 +31,9 @@ public:
 	CQuery(const CString& sName, CIRCNetwork* pNetwork);
 	~CQuery();
 
+	CQuery(const CQuery&) = delete;
+	CQuery& operator=(const CQuery&) = delete;
+
 	// Buffer
 	const CBuffer& GetBuffer() const { return m_Buffer; }
 	unsigned int GetBufferCount() const { return m_Buffer.GetLineCount(); }

include/znc/Socket.h

@@ -140,6 +140,9 @@ private:
 	struct TDNSTask {
 		TDNSTask() : sHostname(""), iPort(0), sSockName(""), iTimeout(0), bSSL(false), sBindhost(""), pcSock(nullptr), bDoneTarget(false), bDoneBind(false), aiTarget(nullptr), aiBind(nullptr) {}
 
+		TDNSTask(const TDNSTask&) = delete;
+		TDNSTask& operator=(const TDNSTask&) = delete;
+
 		CString   sHostname;
 		u_short   iPort;
 		CString   sSockName;
@@ -157,6 +160,9 @@ private:
 	public:
 		CDNSJob() : sHostname(""), task(nullptr), pManager(nullptr), bBind(false), iRes(0), aiResult(nullptr) {}
 
+		CDNSJob(const CDNSJob&) = delete;
+		CDNSJob& operator=(const CDNSJob&) = delete;
+
 		CString       sHostname;
 		TDNSTask*     task;
 		CSockManager* pManager;

include/znc/Utils.h

@@ -222,6 +222,9 @@ public:
 	CBlowfish(const CString & sPassword, int iEncrypt, const CString & sIvec = "");
 	~CBlowfish();
 
+	CBlowfish(const CBlowfish&) = default;
+	CBlowfish& operator=(const CBlowfish&) = default;
+
 	//! output must be freed
 	static unsigned char *MD5(const unsigned char *input, u_int ilen);