Implement message-tags spec

Message tags were supported already, but not arbitrary tags, and not
TAGMSG

modules/modpython/functions.in

@@ -103,6 +103,9 @@ EModRet OnChanNoticeMessage(CNoticeMessage& Message)
 EModRet OnTopicMessage(CTopicMessage& Message)
 EModRet OnSendToClientMessage(CMessage& Message)
 EModRet OnSendToIRCMessage(CMessage& Message)
+EModRet OnUserTagMessage(CTargetMessage& Message)
+EModRet OnChanTagMessage(CTargetMessage& Message)
+EModRet OnPrivTagMessage(CTargetMessage& Message)
 
 EModRet OnAddUser(CUser& User, CString& sErrorRet)
 EModRet OnDeleteUser(CUser& User)

modules/modpython/module.h

@@ -180,6 +180,9 @@ class ZNC_EXPORT_LIB_EXPORT CPyModule : public CModule {
     EModRet OnTopicMessage(CTopicMessage& Message) override;
     EModRet OnSendToClientMessage(CMessage& Message) override;
     EModRet OnSendToIRCMessage(CMessage& Message) override;
+    EModRet OnUserTagMessage(CTargetMessage& Message) override;
+    EModRet OnChanTagMessage(CTargetMessage& Message) override;
+    EModRet OnPrivTagMessage(CTargetMessage& Message) override;
 
     // Global Modules
     EModRet OnAddUser(CUser& User, CString& sErrorRet) override;

modules/modpython/znc.py

@@ -704,6 +704,15 @@ class Module:
     def OnSendToIRCMessage(self, msg):
         pass
 
+    def OnUserTagMessage(self, msg):
+        pass
+
+    def OnChanTagMessage(self, msg):
+        pass
+
+    def OnPrivTagMessage(self, msg):
+        pass
+
 
 class Command:
     command = ''