anchor.diff:  
   Distributed::
   * Fix synchronization in LocalCheckpointTracker#contains {pull}38755[#38755]
  -Features/ILM::
  -* Preserve ILM operation mode when creating new lifecycles {pull}38134[#38134], {pull}38230[#38230])
  -
  -Features/Monitoring::
  -* Allow built-in monitoring_user role to call GET _xpack API {pull}38060[#38060] (issue: {issue}37970[#37970])
   
   Geo::
   * Fix GeoHash PrefixTree BWC {pull}38584[#38584] (issue: {issue}38494[#38494])
   * Geo: Do not normalize the longitude with value -180 for Lucene shapes {pull}37299[#37299] (issue: {issue}37297[#37297])
   
  +ILM::
  +* Preserve ILM operation mode when creating new lifecycles {pull}38134[#38134], {pull}38230[#38230])
  +
   Machine Learning::
   * Fix error race condition on stop _all datafeeds and close _all jobs {pull}38113[#38113] (issue: {issue}37959[#37959])
   * Update ML results mappings on process start {pull}37706[#37706] (issue: {issue}37607[#37607])
  +
  +Monitoring::
  +* Allow built-in monitoring_user role to call GET _xpack API {pull}38060[#38060] (issue: {issue}37970[#37970])
   
   Network::
   * Reload SSL context on file change for LDAP {pull}36937[#36937] (issues: {issue}30509[#30509], {issue}36923[#36923])
  
positive.code: * Bubble up exception when processing NoOp {pull}39338[#39338] (issue: {issue}38898[#38898])
  * Advance max_seq_no before add operation to Lucene {pull}38879[#38879] (issue: {issue}31629[#31629])
  
  Features/Watcher::
  * Only flush Watcher's bulk processor if Watcher is enabled {pull}38803[#38803] (issue: {issue}38798[#38798])
  
  Machine Learning::
  * [ML] Stop the ML memory tracker before closing node {pull}39111[#39111] (issue: {issue}37117[#37117])
  
  SQL::
  * SQL: Fix merging of incompatible multi-fields {pull}39560[#39560] (issue: {issue}39547[#39547])
  * SQL: ignore UNSUPPORTED fields for JDBC and ODBC modes in 'SYS COLUMNS' {pull}39518[#39518] (issue: {issue}39471[#39471])
  * SQL: Use underlying exact field for LIKE/RLIKE {pull}39443[#39443] (issue: {issue}39442[#39442])
  * SQL: enforce JDBC driver - ES server version parity {pull}38972[#38972] (issue: {issue}38775[#38775])
  * SQL: fall back to using the field name for column label {pull}38842[#38842] (issue: {issue}38831[#38831])
  * SQL: normalized keywords shouldn't be allowed for groupings and sorting [ISSUE] {pull}35203[#35203]
  
  Search::
  * Fix Fuzziness#asDistance(String) {pull}39643[#39643] (issue: {issue}39614[#39614])
  * Fix simple query string serialization conditional {pull}38960[#38960] (issues: {issue}21504[#21504], {issue}38889[#38889])
  
  [[release-notes-6.6.1]]
  == {es} version 6.6.1
  
negative.code: Authentication::
  * Disable BWC mode in TokenService by default {pull}38881[#38881]
  
  [[enhancement-6.6.2]]
  [float]
  === Enhancements
  
  SQL::
  * Enhance checks for inexact fields {pull}39427[#39427] (issue: {issue}38501[#38501])
  * Add "validate.properties" property to JDBC's allowed list of settings {pull}39050[#39050] (issue: {issue}38068[#38068])
  
  [[bug-6.6.2]]
  [float]
  