[InfluxDB] Update the configuration file

[rkuchan]

• Add the same note in [InfluxDB] Update the admin UI documentation #1107 to the [admin] section about it being removed.
• Update the top bind-address setting to bind-address = "127.0.0.1:8088"; also check the backup and restore guide - this change probably requires the user to configure the bind-address setting before performing a remote backup.
• Add the wal-fsync-delay = "0s" setting below the wal-dir setting:

  The amount of time that a write waits before fsyncing. Use a duration greater than 0 to batch up multiple fsync calls. This is useful for slower disks or when experiencing WAL write contention. A value of 0s fsyncs every write to the WAL. We recommend values in the range of 0ms-100ms for non-SSD disks.