Merge #16621: doc: add default bitcoin.conf locations

1373fa7e3d doc: add default bitcoin.conf locations (Chuf)

Pull request description:

  Added default bitcoin.conf data directories and paths

ACKs for top commit:
  practicalswift:
    ACK 1373fa7e3d
  ryanofsky:
    ACK 1373fa7e3d
  fanquake:
    ACK 1373fa7e3d - Already three ACKs and lots of discussion here, so I'm going to merge, and the other comment

Tree-SHA512: 8bb1ed9868c5d171b6791bd6dc9598eddfdf64977d327ff4f333323cef8e3e76b1a67da21e4199f008a12f5610ac6dc6f34f4a13235e8846754eb6d6e5075da4

doc/bitcoin-conf.md

@@ -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).