Add more info about Haiku to README.md

Replacing second "BSD Guests" section, because it was duplicated above.

README.md

@@ -330,15 +330,28 @@ tpm="on"
   * `fixed_iso=` specifies the ISO image that provides VirtIO drivers.
   * `tpm="on"` instructs `quickemu` to create a software emulated TPM device using `swtpm`.
 
-## BSD Guests
+## Haiku Guests
 
-`quickemu` supports FreeBSD and OpenBSD.
+`quickemu` supports [Haiku](https://www.haiku-os.org/).
 
 ```bash
-quickget freebsd 13_0
-quickemu --vm freebsd-13_0.conf
+quickget quickget haiku r1beta3-x86_64
+quickemu --vm haiku-r1beta3-x86_64.conf
 ```
 
+At the moment the only way to share files between host and a Haiku guest is by
+using SSH (having a SSH server running on the host):
+
+On guest:
+
+```bash
+scp example.txt user@host-local-ip:/home/user # sending a file from guest to host
+scp user@host-local-ip:/home/user/example.txt . # receiving a file from host to guest
+```
+
+`quickget` cannot automatically download and create virtual machines for Haiku
+nightly versions, but they work if the ISO and configuration are set up manually.
+
 # SPICE
 
 The following features are available while using the SPICE protocol: