Cannot exclude hostname from being proxied

[m00nwtchr]

Version of Searx, commit number if you are using on master branch and stipulate if you forked Searx
1.0.0-361-03eb9c24
How did you install Searx?
searx-docker
What happened?
I'm trying to exclude a single hostname from being proxied via Tor, while keeping everything else proxied.
According to the python httpx documentation (https://www.python-httpx.org/advanced/#http-proxying) this can be done like this:

proxies = {
    "all://": "socks5h://tor:9100",
    "all://prowlarr": None,
}

which should translate to this searx settings.yml:

    proxies:
        all://:
            - socks5h://tor:9100
        all://prowlarr: null

but it causes searx to crash on startup

Screenshots & Logs

Traceback (most recent call last):
  File "/usr/local/searx/searx/webapp.py", line 156, in <module>
    search_initialize(enable_checker=True, check_network=True)
  File "/usr/local/searx/searx/search/__init__.py", line 57, in initialize
    check_network_configuration()
  File "/usr/local/searx/searx/network/network.py", line 295, in check_network_configuration
    raise RuntimeError("Invalid network configuration")
RuntimeError: Invalid network configuration
unable to load app 0 (mountpoint='') (callable not found or import error)
*** no app loaded. going in full dynamic mode ***
--- no python application found, check your startup logs for errors ---
--- no python application found, check your startup logs for errors ---
--- no python application found, check your startup logs for errors ---

and

ERROR:searx.network.<name>:Error
Traceback (most recent call last):
  File "/usr/local/searx/searx/network/network.py", line 286, in check
    await network.get_client()
  File "/usr/local/searx/searx/network/network.py", line 187, in get_client
    client = new_client(
  File "/usr/local/searx/searx/network/client.py", line 125, in new_client
    if proxy_url.startswith('socks4://') \
AttributeError: 'NoneType' object has no attribute 'startswith'

repeated for every search engine

[unixfox]

@dalf any help here?

[dalf]

This is feature is not implemented, but it should be possible.