rpc: Include rpc/util.h where needed for RPCHelpMan

Just a preparatory commit to add the header to the includes and run
clang-format to sort the include lists.

Splitting this up into a separate commit makes future scripted-diffs
easier.

src/rpc/blockchain.cpp

@@ -12,8 +12,8 @@
 #include <checkpoints.h>
 #include <coins.h>
 #include <consensus/validation.h>
-#include <validation.h>
 #include <core_io.h>
+#include <hash.h>
 #include <index/txindex.h>
 #include <key_io.h>
 #include <policy/feerate.h>
@@ -21,14 +21,15 @@
 #include <policy/rbf.h>
 #include <primitives/transaction.h>
 #include <rpc/server.h>
+#include <rpc/util.h>
 #include <script/descriptor.h>
 #include <streams.h>
 #include <sync.h>
 #include <txdb.h>
 #include <txmempool.h>
-#include <util/system.h>
 #include <util/strencodings.h>
-#include <hash.h>
+#include <util/system.h>
+#include <validation.h>
 #include <validationinterface.h>
 #include <versionbitsinfo.h>
 #include <warnings.h>

src/rpc/mining.cpp

@@ -18,10 +18,11 @@
 #include <rpc/blockchain.h>
 #include <rpc/mining.h>
 #include <rpc/server.h>
+#include <rpc/util.h>
 #include <shutdown.h>
 #include <txmempool.h>
-#include <util/system.h>
 #include <util/strencodings.h>
+#include <util/system.h>
 #include <validation.h>
 #include <validationinterface.h>
 #include <versionbitsinfo.h>

src/rpc/net.cpp

@@ -7,17 +7,18 @@
 #include <chainparams.h>
 #include <clientversion.h>
 #include <core_io.h>
-#include <validation.h>
 #include <net.h>
 #include <net_processing.h>
 #include <netbase.h>
 #include <policy/policy.h>
 #include <rpc/protocol.h>
+#include <rpc/util.h>
 #include <sync.h>
 #include <timedata.h>
 #include <ui_interface.h>
-#include <util/system.h>
 #include <util/strencodings.h>
+#include <util/system.h>
+#include <validation.h>
 #include <version.h>
 #include <warnings.h>
 

src/rpc/rawtransaction.cpp

@@ -10,10 +10,8 @@
 #include <core_io.h>
 #include <index/txindex.h>
 #include <init.h>
-#include <keystore.h>
-#include <validation.h>
-#include <validationinterface.h>
 #include <key_io.h>
+#include <keystore.h>
 #include <merkleblock.h>
 #include <net.h>
 #include <policy/policy.h>
@@ -29,6 +27,8 @@
 #include <txmempool.h>
 #include <uint256.h>
 #include <util/strencodings.h>
+#include <validation.h>
+#include <validationinterface.h>
 
 #include <future>
 #include <stdint.h>

src/rpc/server.cpp

@@ -8,11 +8,12 @@
 #include <fs.h>
 #include <key_io.h>
 #include <random.h>
+#include <rpc/util.h>
 #include <shutdown.h>
 #include <sync.h>
 #include <ui_interface.h>
-#include <util/system.h>
 #include <util/strencodings.h>
+#include <util/system.h>
 
 #include <boost/bind.hpp>
 #include <boost/signals2/signal.hpp>

src/wallet/rpcdump.cpp

@@ -3,18 +3,19 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chain.h>
+#include <core_io.h>
 #include <interfaces/chain.h>
 #include <key_io.h>
+#include <merkleblock.h>
 #include <rpc/server.h>
-#include <validation.h>
+#include <rpc/util.h>
 #include <script/script.h>
 #include <script/standard.h>
 #include <sync.h>
 #include <util/system.h>
 #include <util/time.h>
+#include <validation.h>
 #include <wallet/wallet.h>
-#include <merkleblock.h>
-#include <core_io.h>
 
 #include <wallet/rpcwallet.h>
 

src/zmq/zmqrpc.cpp

@@ -5,6 +5,7 @@
 #include <zmq/zmqrpc.h>
 
 #include <rpc/server.h>
+#include <rpc/util.h>
 #include <zmq/zmqabstractnotifier.h>
 #include <zmq/zmqnotificationinterface.h>