modules/m_room_history_visibility: Add preliminary stub.

modules/Makefile.am

@@ -85,6 +85,7 @@ m_room_la_SOURCES = m_room.cc
 m_room_create_la_SOURCES = m_room_create.cc
 m_room_member_la_SOURCES = m_room_member.cc
 m_room_join_rules_la_SOURCES = m_room_join_rules.cc
+m_room_history_visibility_la_SOURCES = m_room_history_visibility.cc
 
 m_module_LTLIBRARIES = \
 	m_noop.la \
@@ -95,6 +96,7 @@ m_module_LTLIBRARIES = \
 	m_room_create.la \
 	m_room_member.la \
 	m_room_join_rules.la \
+	m_room_history_visibility.la \
 	###
 
 ###############################################################################

modules/m_room_history_visibility.cc

@@ -0,0 +1,48 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+using namespace ircd;
+
+mapi::header
+IRCD_MODULE
+{
+	"Matrix m.room.history_visibility"
+};
+
+static void
+_changed_visibility(const m::event &event)
+{
+
+}
+
+const m::hook<>
+_changed_visibility_hookfn
+{
+	_changed_visibility,
+	{
+		{ "_site",    "vm.notify"                  },
+		{ "type",     "m.room.history_visibility"  },
+	}
+};
+
+static void
+_event_visible(const m::event &event)
+{
+
+}
+
+const m::hook<>
+_event_visible_hookfn
+{
+	_event_visible,
+	{
+		{ "_site",    "m.event.visible"            },
+	}
+};