[doc] clarify getdata limit after #14897

HashUnlimited · web-flow · commit c119ba3c9b32 · 2019-02-20T21:00:04.000+01:00
GETDATA is limited to blocks and transactions now and can't be used for other non-block data
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
@@ -3877,7 +3877,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
         }
 
         //
-        // Message: getdata (non-blocks)
+        // Message: getdata (transactions)
         //
         auto& tx_process_time = state.m_tx_download.m_tx_process_time;
         while (!tx_process_time.empty() && tx_process_time.begin()->first <= nNow && state.m_tx_download.m_tx_in_flight.size() < MAX_PEER_TX_IN_FLIGHT) {

Original file line number	Diff line number	Diff line change
`@@ -3877,7 +3877,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)`
`3877`	`3877`	`}`
`3878`	`3878`
`3879`	`3879`	`//`
`3880`		`- // Message: getdata (non-blocks)`
	`3880`	`+ // Message: getdata (transactions)`
`3881`	`3881`	`//`
`3882`	`3882`	`auto& tx_process_time = state.m_tx_download.m_tx_process_time;`
`3883`	`3883`	`while (!tx_process_time.empty() && tx_process_time.begin()->first <= nNow && state.m_tx_download.m_tx_in_flight.size() < MAX_PEER_TX_IN_FLIGHT) {`