| maybe keep more verbose interfaces::Init comment

Author: ryanofsky

Diff for: src/interfaces/init.h

@@ -22,7 +22,9 @@ class WalletClient;
 //! There is a different Init interface implementation for each process
 //! (bitcoin-gui, bitcoin-node, bitcoin-wallet, bitcoind, bitcoin-qt) and each
 //! implementation can implement the make methods for interfaces it supports.
-//! The default make methods all return null.
+//! The default make methods all return null. If IPC is enabled Init is the
+//! initial interface returned from the process being controlled to the
+//! controlling process when the connection is established.
 class Init
 {
 public: