Fix issues with testnet dir and update docs (#992)

beacon_node/client/src/config.rs

@@ -14,26 +14,21 @@ const DEFAULT_FREEZER_DB_DIR: &str = "freezer_db";
 /// Defines how the client should initialize the `BeaconChain` and other components.
 #[derive(PartialEq, Debug, Clone, Serialize, Deserialize)]
 pub enum ClientGenesis {
-    /// Reads the genesis state and other persisted data from the `Store`.
-    Resume,
     /// Creates a genesis state as per the 2019 Canada interop specifications.
     Interop {
         validator_count: usize,
         genesis_time: u64,
     },
+    /// Reads the genesis state and other persisted data from the `Store`.
+    FromStore,
     /// Connects to an eth1 node and waits until it can create the genesis state from the deposit
     /// contract.
     DepositContract,
-    /// Loads the genesis state from a SSZ-encoded `BeaconState` file.
-    SszFile { path: PathBuf },
     /// Loads the genesis state from SSZ-encoded `BeaconState` bytes.
     ///
     /// We include the bytes instead of the `BeaconState<E>` because the `EthSpec` type
     /// parameter would be very annoying.
     SszBytes { genesis_state_bytes: Vec<u8> },
-    /// Connects to another Lighthouse instance and reads the genesis state and other data via the
-    /// HTTP API.
-    RemoteNode { server: String, port: Option<u16> },
 }
 
 impl Default for ClientGenesis {