Changes:
- Add trailing slash to base URL to prevent potential redirects
- Remove advanced search syntax filtering (no longer guarantees a CAPTCHA)
- Correct pagination offset calculation: Page 2 now starts at offset 10,
subsequent pages use 10 + (n-2)*15 formula instead of the previous
broken 20 + (n-2)*50 calculation that caused CAPTCHAs
- Restructure request parameter building to better match a real request
- "kt" cookie is no longer an empty string if the language/region is "all"
- Group related parameter assignments together
- Add header logging to debugging output
Related:
- https://github.com/searxng/searxng/issues/4824