message: doc: Add anchors.dat to files.md
diff: @@ -50,6 +50,7 @@ Subdirectory | File(s) | Description
  `indexes/blockfilter/basic/db/` | LevelDB database | Blockfilter index LevelDB database for the basic filtertype; *optional*, used if `-blockfilterindex=basic`
  `indexes/blockfilter/basic/` | `fltrNNNNN.dat`<sup>[\[2\]](#note2)</sup> | Blockfilter index filters for the basic filtertype; *optional*, used if `-blockfilterindex=basic`
  `wallets/` | | [Contains wallets](#multi-wallet-environment); can be specified by `-walletdir` option; if `wallets/` subdirectory does not exist, wallets reside in the [data directory](#data-directory-location)
  +`./` | `anchors.dat` | Anchor IP address database, created on shutdown and deleted at startup. Anchors are last known outgoing block-relay-only peers that are tried to re-connect to on startup
  `./` | `banlist.dat` | Stores the IPs/subnets of banned nodes
  `./` | `peercoin.conf` | Contains [configuration settings](peercoin-conf.md) for `peercoind` or `peercoin-qt`; File is not written to by the software and must be created manually. Path can be specified by `-conf` option
  `./` | `peercoind.pid` | Stores the process ID (PID) of `peercoind` or `peercoin-qt` while running; created at start and deleted on shutdown; can be specified by `-pid` option
  