How to use Swap Without Redezvous Point? or Add Better DOCS for Redezvous Points
**Describe the bug**

```
C:\Users\maste\Downloads\commit-xmr-btc-swap>swap list-sellers
Error: error: The following required arguments were not provided:
    --rendezvous-point <rendezvous-point>

USAGE:
    swap list-sellers --rendezvous-point <rendezvous-point> --tor-socks5-port <tor-socks5-port>

For more information try --help


C:\Users\maste\Downloads\commit-xmr-btc-swap>
```

Before I encountered the first 2 issues, I had run the asb without a redezvous point. I have no idea what a redezvous point is nor do I know how to use it nor do I know how to create one! There's no documentation just a url to libp2p. This is a huge concern.

Since the asb was running, I was wondering if the swap could detect it, so I ran the above command and that's the message I got.

**Lost/trapped Funds**
No

**Debug logs**
Please post your debug logs. You find them in:
Linux: /home/<user>/.local/share/xmr-btc-swap/logs
OSX: /Users/<user>/Library/ApplicationSupport/xmr-btc-swap/logs

**Platform (please complete the following information):**

- CLI v0.10.2
- Software Version [e.g. 0.8.3]
- Operating System: Windows 10
