don't publish intrducers with zero tag

libi2pd/RouterInfo.cpp

@@ -1321,6 +1321,7 @@ namespace data
 					int i = 0;
 					for (const auto& introducer: address.ssu->introducers)
 					{
+						if (!introducer.iTag) continue;
 						if (introducer.iExp) // expiration is specified
 						{
 							WriteString ("iexp" + boost::lexical_cast<std::string>(i), properties);
@@ -1333,6 +1334,7 @@ namespace data
 					i = 0;
 					for (const auto& introducer: address.ssu->introducers)
 					{
+						if (!introducer.iTag) continue;
 						WriteString ("ih" + boost::lexical_cast<std::string>(i), properties);
 						properties << '=';
 						char value[64];
@@ -1345,6 +1347,7 @@ namespace data
 					i = 0;
 					for (const auto& introducer: address.ssu->introducers)
 					{
+						if (!introducer.iTag) continue;
 						WriteString ("itag" + boost::lexical_cast<std::string>(i), properties);
 						properties << '=';
 						WriteString (boost::lexical_cast<std::string>(introducer.iTag), properties);

libi2pd/SSU2.cpp

@@ -995,7 +995,7 @@ namespace transport
 				session = it1->second;
 				excluded.insert (it);
 			}
-			if (session && session->IsEstablished ())
+			if (session && session->IsEstablished () && session->GetRelayTag () && session->IsOutgoing ()) // still session with introducer?
 			{
 				if (ts < session->GetCreationTime () + SSU2_TO_INTRODUCER_SESSION_EXPIRATION)
 				{