Connecting an own server asked Ollama's /api/tags and gave up on any answer
that was not a 404, and every failure, a refused key included, read as "not
responding". The model list is now looked for at /api/tags, at the address as
entered and at /v1/models, an answer only counts when it is a list, and a
refused key or a server that answered without a list say so (#2808).
AI parsing through an own server always called Ollama's /api/chat, which an
OpenAI-compatible server such as Groq answers with 404. A server without it
now gets the same extraction over /chat/completions at the address as
entered (#2806).