xF2 Eklenti Search Improvements By Xon 2.17.3

• Improve handling of expired search links to return a 404 if any errors exist with the arguments as this stops google search indexer from complaining about the previous 400 error code

For XF2.3.4+, check "View server information" admin permission when viewing elasticsearch statistics

• Fix when logging debugging for some search queries would throw unexpectedly

• Enhanced specialized search with additional debug capabilities
• Update specialized search to support SearchOrder type
• Fix XF2.1 when using specialized search functionality (aka fix tag/user autocomplete with XF2.1)