[BIP 152] Fix invalid link

Author: sdaftuar

bip-0152.mediawiki

@@ -26,7 +26,7 @@ While the goal of this work is explicitly not to reduce block transfer latency,
 ===Intended Protocol Flow===
 <img src=bip-0152/protocol-flow.png></img>
 
-The protocol is intended to be used in two ways, depending on the peers and bandwidth available, as discussed [[#Implementation_Details|later]]. The "high-bandwidth" mode, which nodes may only enable for a few of their peers, is enabled by setting the first boolean to 1 in a <code>sendcmpct</code> message. In this mode, peers send new block announcements with the short transaction IDs already (via a <code>cmpctblock</code> message), possibly even before fully validating the block (as indicated by the grey box in the image above). In some cases no further round-trip is needed, and the receiver can reconstruct the block and process it as usual immediately. When some transactions were not available from local sources (ie mempool), a <code>getblocktxn</code>/<code>blocktxn</code> roundtrip is necessary, bringing the best-case latency to the same 1.5*RTT minimum time that nodes take today, though with significantly less bandwidth usage.
+The protocol is intended to be used in two ways, depending on the peers and bandwidth available, as discussed [[#Implementation_Notes|later]]. The "high-bandwidth" mode, which nodes may only enable for a few of their peers, is enabled by setting the first boolean to 1 in a <code>sendcmpct</code> message. In this mode, peers send new block announcements with the short transaction IDs already (via a <code>cmpctblock</code> message), possibly even before fully validating the block (as indicated by the grey box in the image above). In some cases no further round-trip is needed, and the receiver can reconstruct the block and process it as usual immediately. When some transactions were not available from local sources (ie mempool), a <code>getblocktxn</code>/<code>blocktxn</code> roundtrip is necessary, bringing the best-case latency to the same 1.5*RTT minimum time that nodes take today, though with significantly less bandwidth usage.
 
 The "low-bandwidth" mode is enabled by setting the first boolean to 0 in a <code>sendcmpct</code> message. In this mode, peers send new block announcements with the usual inv/headers announcements (as per BIP130, and after fully validating the block). The receiving peer may then request the block using a MSG_CMPCT_BLOCK <code>getdata</code> request, which will receive a response of the header and short transaction IDs. In some cases no further round-trip is needed, and the receiver can reconstruct the block and process it as usual, taking the same 1.5*RTT minimum time that nodes take today, though with significantly less bandwidth usage. When some transactions were not available from local sources (ie mempool), a <code>getblocktxn</code>/<code>blocktxn</code> roundtrip is necessary, bringing the latency to at least 2.5*RTT in this case, again with significantly less bandwidth usage than today. Because TCP often exhibits worse transfer latency for larger data sizes (as a multiple of RTT), total latency is expected to be reduced even when the full 2.5*RTT transfer mechanism is used.