Add stripcontrols module (#387)

This replaces #850. It was decided that the functionality is provided
by a separate module instead, to avoid unnecessarily bloating the core.

modules/stripcontrols.cpp

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2004-2015 ZNC, see the NOTICE file for details.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <znc/Modules.h>
+
+class CStripControlsMod : public CModule {
+public:
+	MODCONSTRUCTOR(CStripControlsMod) {}
+
+	EModRet OnPrivCTCP(CNick& Nick, CString& sMessage) override {
+		sMessage.StripControls();
+		return CONTINUE;
+	}
+
+	EModRet OnChanCTCP(CNick& Nick, CChan& Channel, CString& sMessage) override {
+		sMessage.StripControls();
+		return CONTINUE;
+	}
+
+	EModRet OnPrivNotice(CNick& Nick, CString& sMessage) override {
+		sMessage.StripControls();
+		return CONTINUE;
+	}
+
+	EModRet OnChanNotice(CNick& Nick, CChan& Channel, CString& sMessage) override {
+		sMessage.StripControls();
+		return CONTINUE;
+	}
+
+	EModRet OnPrivMsg(CNick& Nick, CString& sMessage) override {
+		sMessage.StripControls();
+		return CONTINUE;
+	}
+
+	EModRet OnChanMsg(CNick& Nick, CChan& Channel, CString& sMessage) override {
+		sMessage.StripControls();
+		return CONTINUE;
+	}
+};
+
+template<> void TModInfo<CStripControlsMod>(CModInfo& Info) {
+	Info.SetWikiPage("stripcontrols");
+	Info.AddType(CModInfo::UserModule);
+}
+
+NETWORKMODULEDEFS(CStripControlsMod, "Strips control codes (Colors, Bold, ..) from channel and private messages.")