scripted-diff: Rename InitInterfaces to NodeContext

-BEGIN VERIFY SCRIPT-
s() { git grep -l "$1" src | xargs sed -i "s/$1/$2/g"; }

s 'struct InitInterfaces'              'struct NodeContext'
s 'InitInterfaces interfaces'          'NodeContext node'
s 'InitInterfaces& interfaces'         'NodeContext\& node'
s 'InitInterfaces m_interfaces'        'NodeContext m_context'
s 'InitInterfaces\* g_rpc_interfaces'  'NodeContext* g_rpc_node'
s 'g_rpc_interfaces = &interfaces'     'g_rpc_node = \&node'
s 'g_rpc_interfaces'                   'g_rpc_node'
s 'm_interfaces'                       'm_context'
s 'interfaces\.chain'                  'node.chain'
s '\(AppInitMain\|Shutdown\|Construct\)(interfaces)' '\1(node)'
s 'init interfaces' 'chain clients'
-END VERIFY SCRIPT-

src/bitcoind.cpp

@@ -39,8 +39,8 @@ static void WaitForShutdown()
 //
 static bool AppInit(int argc, char* argv[])
 {
-    InitInterfaces interfaces;
-    interfaces.chain = interfaces::MakeChain();
+    NodeContext node;
+    node.chain = interfaces::MakeChain();
 
     bool fRet = false;
 
@@ -142,7 +142,7 @@ static bool AppInit(int argc, char* argv[])
             // If locking the data directory failed, exit immediately
             return false;
         }
-        fRet = AppInitMain(interfaces);
+        fRet = AppInitMain(node);
     }
     catch (const std::exception& e) {
         PrintExceptionContinue(&e, "AppInit()");
@@ -156,7 +156,7 @@ static bool AppInit(int argc, char* argv[])
     } else {
         WaitForShutdown();
     }
-    Shutdown(interfaces);
+    Shutdown(node);
 
     return fRet;
 }