Timeout#Timeout(): don't pass yield_context to callback

It's not used. Also, the callback shall run completely at once. This ensures that it won't (continue to) run once another coroutine on the strand calls Timeout#Cancel().

lib/base/io-engine.hpp

@@ -199,7 +199,7 @@ public:
 			}
 
 			auto f (onTimeout);
-			f(std::move(yc));
+			f();
 		});
 	}
 

lib/base/tlsstream.cpp

@@ -141,7 +141,7 @@ void AsioTlsStream::GracefulDisconnect(boost::asio::io_context::strand& strand,
 
 	{
 		Timeout::Ptr shutdownTimeout(new Timeout(strand.context(), strand, boost::posix_time::seconds(10),
-			[this](boost::asio::yield_context yc) {
+			[this] {
 				// Forcefully terminate the connection if async_shutdown() blocked more than 10 seconds.
 				ForceDisconnect();
 			}

lib/icingadb/redisconnection.hpp

@@ -520,7 +520,7 @@ Timeout::Ptr RedisConnection::MakeTimeout(StreamPtr& stream)
 		m_Strand.context(),
 		m_Strand,
 		boost::posix_time::microseconds(intmax_t(m_ConnectTimeout * 1000000)),
-		[keepAlive, stream](boost::asio::yield_context yc) {
+		[keepAlive, stream] {
 			boost::system::error_code ec;
 			stream->lowest_layer().cancel(ec);
 		}

lib/methods/ifwapichecktask.cpp

@@ -457,7 +457,7 @@ void IfwApiCheckTask::ScriptFunc(const Checkable::Ptr& checkable, const CheckRes
 		*strand,
 		[strand, checkable, cr, psCommand, psHost, expectedSan, psPort, conn, req, checkTimeout, reportResult = std::move(reportResult)](asio::yield_context yc) {
 			Timeout::Ptr timeout = new Timeout(strand->context(), *strand, boost::posix_time::microseconds(int64_t(checkTimeout * 1e6)),
-				[&conn, &checkable](boost::asio::yield_context yc) {
+				[&conn, &checkable] {
 					Log(LogNotice, "IfwApiCheckTask")
 						<< "Timeout while checking " << checkable->GetReflectionType()->GetName()
 						<< " '" << checkable->GetName() << "', cancelling attempt";

lib/remote/apilistener.cpp

@@ -535,7 +535,7 @@ void ApiListener::ListenerCoroutineProc(boost::asio::yield_context yc, const Sha
 
 			IoEngine::SpawnCoroutine(*strand, [this, strand, sslConn, remoteEndpoint](asio::yield_context yc) {
 				Timeout::Ptr timeout(new Timeout(strand->context(), *strand, boost::posix_time::microseconds(int64_t(GetConnectTimeout() * 1e6)),
-					[sslConn, remoteEndpoint](asio::yield_context yc) {
+					[sslConn, remoteEndpoint] {
 						Log(LogWarning, "ApiListener")
 							<< "Timeout while processing incoming connection from " << remoteEndpoint;
 
@@ -586,7 +586,7 @@ void ApiListener::AddConnection(const Endpoint::Ptr& endpoint)
 			lock.unlock();
 
 			Timeout::Ptr timeout(new Timeout(strand->context(), *strand, boost::posix_time::microseconds(int64_t(GetConnectTimeout() * 1e6)),
-				[sslConn, endpoint, host, port](asio::yield_context yc) {
+				[sslConn, endpoint, host, port] {
 					Log(LogCritical, "ApiListener")
 						<< "Timeout while reconnecting to endpoint '" << endpoint->GetName() << "' via host '" << host
 						<< "' and port '" << port << "', cancelling attempt";
@@ -687,7 +687,7 @@ void ApiListener::NewClientHandlerInternal(
 			strand->context(),
 			*strand,
 			boost::posix_time::microseconds(intmax_t(Configuration::TlsHandshakeTimeout * 1000000)),
-			[strand, client](asio::yield_context yc) {
+			[strand, client] {
 				boost::system::error_code ec;
 				client->lowest_layer().cancel(ec);
 			}