Allow VSOCK in Ansible hostnames

The VSOCK address family facilitates communication between virtual
machines and the host they are running on. An example:
https://wiki.archlinux.org/title/QEMU#Accessing_SSH_via_vsock

The separator between the "vsock" identifier and the CID can either be a
forward slash (`/`) or a percent sign (`%`). `urllib.parse.urlparse`
will mistake the forward slash for the beginning of the URL path, but a
percent sign is accepted.

```
>>> urlparse("ansible://vsock/555")
ParseResult(scheme='ansible', netloc='vsock', path='/555', params='', query='', fragment='')
>>> urlparse("ansible://vsock%555")
ParseResult(scheme='ansible', netloc='vsock%555', path='', params='', query='', fragment='')
```

Author: francoisfreitag

test/test_backends.py

@@ -212,6 +212,13 @@ def get_vars(host):
                 "host.name": "host",
             },
         ),
+        (
+            {},
+            b"host ansible_host=vsock%555",
+            {
+                "host.name": "vsock%555",
+            },
+        ),
         (
             {},
             b"host ansible_connection=smart",

testinfra/utils/ansible_runner.py

@@ -17,6 +17,7 @@
 import json
 import os
 import tempfile
+import urllib.parse
 from collections.abc import Iterator
 from typing import Any, Callable, Optional, Union
 
@@ -214,7 +215,7 @@ def get_config(
     if version == 6:
         spec += "[" + testinfra_host + "]"
     else:
-        spec += testinfra_host
+        spec += urllib.parse.quote(testinfra_host)
     if port:
         spec += f":{port}"
     return testinfra.get_host(spec, **kwargs)