Log Message:
postgresql12: added version 12.0

Release 12:

General performance improvements, including:
* Optimizations to space utilization and read/write performance for B-tree indexes
* Partitioning performance enhancements, including improved query performance on \ 
tables with thousands of partitions, improved insertion performance with INSERT \ 
and COPY, and the ability to execute ALTER TABLE ATTACH PARTITION without \ 
blocking queries
* Automatic (but overridable) inlining of common table expressions (CTEs)
* Reduction of WAL overhead for creation of GiST, GIN, and SP-GiST indexes
* Support for covering GiST indexes, via the INCLUDE clause
* Multi-column most-common-value (MCV) statistics can be defined via CREATE \ 
STATISTICS, to support better plans for queries that test several \ 
non-uniformly-distributed columns

Enhancements to administrative functionality, including:
* REINDEX CONCURRENTLY can rebuild an index without blocking writes to its table
* pg_checksums can enable/disable page checksums (used for detecting data \ 
corruption) in an offline cluster
* Progress reporting statistics for CREATE INDEX, REINDEX, CLUSTER, VACUUM FULL, \ 
and pg_checksums

Support for the SQL/JSON path language

Stored generated columns

Nondeterministic ICU collations, enabling case-insensitive and \ 
accent-insensitive grouping and ordering

New authentication features, including:
* Encryption of TCP/IP connections when using GSSAPI authentication
* Discovery of LDAP servers using DNS SRV records
* Multi-factor authentication, using the clientcert=verify-full option combined \ 
with an additional authentication method in pg_hba.conf