edit 8.2.6 release note about ec2_gahp memory leak that occurs due to
the use of an older version of libcurl that had a bug
add 8.2.6 version history item  #4764
Merge branch 'V8_2_6-branch' into V8_2-branch
Merge branch 'V8_2-branch' into V8_3_2-branch
Merge branch 'V8_3_2-branch'