Issue #2597740 by janusman, Nick_vh: To ease debugging, add $_ENV['HTTP_X_REQUEST_ID'] (if present) to outgoing acquia_search URLs
Issue #2631240 by janusman, magtak: Module should set search_api_solr_http_get_max_length to a compatible value
Issue #2117613 by drunken monkey: Original keys might be an array, too.
Issue #2115183 by Nick_vh, drunken monkey: Server's "Files" tab not working.
Issue #2195037 by jhedstrom: Strict PHP warning.
Issue #2172535 by alanmackenzie: Support for search_api_acquia_overrides is broken in 7.x-2.x.
Backport of the UI changes in #1977510 to hide the port settings and remove the url link
Backport of Issue #2087141 by tekante: Fixed acquia_search_host() takes precedence over ['heartbeat_data()']['search_service_colony()'].
Reverting to a state that works for Search API RC3 and below
Issue #2113415 by Nick_vh: Fixed Derived key is not succesfully overridden and port settings should be hidden.
Backport of Issue #2113415 by Nick_vh: Fixed Derived key is not succesfully overridden and port settings should be hidden.
Issue #2087141 by tekante: Fixed acquia_search_host() takes precedence over ['heartbeat_data()']['search_service_colony()'].
Issue #1977510 by drunken monkey, Nick_vh | rikvd: Fixed Acquia Search for Search API is incompatible with Search API Solr search 7.x-1.0-rc4.
Issue #2011106 by janusman, Nick_vh: Modified URL to reflect the overrides.
Issue #1678152 by cpliakas, kenorb, rikvd: Fixed 403s when deleting nodes en-masse.
Issue #1852692 by Marty2081, cpliakas: Fixed overridden connection parameters still used after unchecking "Modify Acquia Search Connection Parameters"
Issue #1689778 by alanmackenzie, cpliakas, Nick_vh: Added support for connecting to more than one subscription.
Fixed typo in comment.
Follow up commit for issue #1618110.
Added all default parameters.
Issue #1619770 by cpliakas: Added default fl param as a backwards compatible change to the missing defaults in Acquia Search's solrconfig.xml file.
Issue #1618110 by cpliakas: Completed eDisMax support.
Issue #1618126 by cpliakas: Replicated the acquia_search_version variable functionality.
Removed unnecessary comments.
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