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Configure searxng with language param set to auto and add "safesearch": 1 (moderate) for safer web results.

- The check for private IP addresses often did not yield the expected results, especially with errors like: `[Errno -2] Name or service not known`.
- Removed the check for private IP addresses in the URL validation process.
- Simplified the `validate_url` function to focus on validating the URL format and checking the existence of the URL using a HEAD request.

To address the unresolved issue in the LangChain library where a single URL error disrupts the data loading process, the lazy_load method in the WebBaseLoader class has been modified. The enhanced method now handles exceptions appropriately, logging errors and continuing with the remaining URLs.

Accept additional parameters such as language, time_range, and categories to tailor the search results.
Raise an exception if a request error occurs during the search process.
Use params argument to construct the query string
Sort by relevance
Expand docstring