message: doc: add default bitcoin.conf locations
  Added default bitcoin.conf data directories and paths
  Added example bitcoin.conf link
diff: @@ -50,3 +50,13 @@ rpcport=4000
  The configuration file is not automatically created; you can create it using your favorite text editor. By default, the configuration file name is `bitcoin.conf` and it is located in the Bitcoin data directory, but both the Bitcoin data directory and the configuration file path may be changed using the `-datadir` and `-conf` command-line options.
  The `includeconf=<file>` option in the `bitcoin.conf` file can be used to include additional configuration files.
  +
  +### Default configuration file locations
  +
  +Operating System | Data Directory | Example Path
  +-- | -- | --
  +Windows | `%APPDATA%\Bitcoin\` | `C:\Users\username\AppData\Roaming\Bitcoin\bitcoin.conf`
  +Linux | `$HOME/.bitcoin/` | `/home/username/.bitcoin/bitcoin.conf`
  +macOS | `$HOME/Library/Application Support/Bitcoin/` | `/Users/username/Library/Application Support/Bitcoin/bitcoin.conf`
  +
  +You can find an example bitcoin.conf file in [share/examples/bitcoin.conf](../share/examples/bitcoin.conf).
  