Import the nopartmsg module which was removed from v4 git.

4/m_nopartmsg.cpp

@@ -0,0 +1,55 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2013, 2021 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2012 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
+ *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
+ *
+ * This file is part of InspIRCd.  InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/// $ModAuthor: Sadie Powell <sadie@witchery.services>
+/// $ModDesc: Adds extended ban p: (partmsg) which blocks the part message of matching users.
+/// $ModDepends: core 4
+
+
+#include "inspircd.h"
+#include "modules/extban.h"
+
+class ModulePartMsgBan final
+	: public Module
+{
+private:
+	ExtBan::Acting extban;
+
+public:
+	ModulePartMsgBan()
+		: Module(VF_VENDOR | VF_OPTCOMMON, "Adds extended ban p: (partmsg) which blocks the part message of matching users.")
+		, extban(this, "partmsg", 'p')
+	{
+	}
+
+	void OnUserPart(Membership* memb, std::string& partmessage, CUList& excepts) override
+	{
+		if (!IS_LOCAL(memb->user))
+			return;
+
+		if (extban.GetStatus(memb->user, memb->chan) == MOD_RES_DENY)
+			partmessage.clear();
+	}
+};
+
+MODULE_INIT(ModulePartMsgBan)