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/rpc/util.h

@@ -25,12 +25,12 @@
 class FillableSigningProvider;
 class CPubKey;
 class CScript;
-struct InitInterfaces;
+struct NodeContext;
 
 //! Pointers to interfaces that need to be accessible from RPC methods. Due to
 //! limitations of the RPC framework, there's currently no direct way to pass in
 //! state to RPC method implementations.
-extern InitInterfaces* g_rpc_interfaces;
+extern NodeContext* g_rpc_node;
 
 /** Wrapper for UniValue::VType, which includes typeAny:
  * Used to denote don't care type. */