Search Improvements 2.17.6

• XF2.3.8 compatibility fix
• Adjust Collect search DSL & debug statistics so Log & show on search results only displays to members by defaults and not guests.

• XF2.3.8 compatibility fix

• Adjust defaults for autocomplete boosts to better favor exact matches.
  • Affects non-default "Tag/Username auto-complete search field boosts" option

• 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)

• Improve 3rd party support for specialized search index support

• Add additional hookpoints for customizing "specialized search indexer" functionality
• On search results page, when searching a conversation(XF2.2)/direct message(XF2.3) display "with conversation/direct message"

• Search extensions API changes for better XF compatibility, required for Conversation Improvements/Essentials
  • XF2.3 compatibility fix for custom "SearchOrder" class
  • Simplify asSqlConstraint code (expected to always return an array)
  • AbstractConstraint::setMatchType needs to normalize to an int for MetadataConstraint::matchType