Subscribes the client to the given patterns. Supported glob-style patterns: - `h?llo` subscribes to `hello`, `hallo` and `hxllo` - `h*llo` subscribes to `hllo` and `heeeello` - `h[ae]llo` subscribes to `hello` and `hallo,` but not `hillo` Use `\` to escape special characters if you want to match them verbatim.