docs: PG 12 relnotes, update btree items

Bruce Momjian <bruce@momjian.us>

Commit: 4bfb79ff6b1fd400b3dbc761921472173675a968
Author: Bruce Momjian <bruce@momjian.us>
Date: 2019-06-13T02:48:04Z
Releases: 12.0
docs: PG 12 relnotes, update btree items

Reported-by: Peter Geoghegan

Discussion: https://postgr.es/m/CAH2-Wzn-aH4ToZEWR05ELSSp7bO_JMn=sMPfUhNruwVmCXKh-w@mail.gmail.com

Files

PathChange+/−
doc/src/sgml/release-12.sgml modified +50 −27

Documentation touched

Discussion