replace MAX_BLOCKS_ONLY_CONNECTIONS with MAX_BLOCK_RELAY_ONLY_CONNECT…

…IONS

Summary:
```
-BEGIN VERIFY SCRIPT-
sed -i 's/\<MAX_BLOCKS_ONLY_CONNECTIONS\>/MAX_BLOCK_RELAY_ONLY_CONNECTIONS/g' src/init.cpp
sed -i 's/\<MAX_BLOCKS_ONLY_CONNECTIONS\>/MAX_BLOCK_RELAY_ONLY_CONNECTIONS/g' src/net.h
-END VERIFY SCRIPT-
```

This is a backport of [[bitcoin/bitcoin#19217 | core#19217]]

Test Plan:
```
ninja all check-all
grep -r MAX_BLOCKS_ONLY_CONNECTIONS ../src/
```
`

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D10019

src/init.cpp

@@ -2960,7 +2960,7 @@ bool AppInitMain(Config &config, RPCServer &rpcServer,
     connOptions.m_max_outbound_full_relay = std::min(
         MAX_OUTBOUND_FULL_RELAY_CONNECTIONS, connOptions.nMaxConnections);
     connOptions.m_max_outbound_block_relay = std::min(
-        MAX_BLOCKS_ONLY_CONNECTIONS,
+        MAX_BLOCK_RELAY_ONLY_CONNECTIONS,
         connOptions.nMaxConnections - connOptions.m_max_outbound_full_relay);
     connOptions.nMaxAddnode = MAX_ADDNODE_CONNECTIONS;
     connOptions.nMaxFeeler = MAX_FEELER_CONNECTIONS;

src/net.h

@@ -70,7 +70,7 @@ static const int MAX_OUTBOUND_FULL_RELAY_CONNECTIONS = 8;
 /** Maximum number of addnode outgoing nodes */
 static const int MAX_ADDNODE_CONNECTIONS = 8;
 /** Maximum number of block-relay-only outgoing connections */
-static const int MAX_BLOCKS_ONLY_CONNECTIONS = 2;
+static const int MAX_BLOCK_RELAY_ONLY_CONNECTIONS = 2;
 /** Maximum number of feeler connections */
 static const int MAX_FEELER_CONNECTIONS = 1;
 /** -listen default */