This patch adds entries for Generic database entries for cloud
and data warehouse databases. This is solely for convenience
for people using the web server as a convenient frontend for
SQL database.

Conventional RDBMS databases moved into the cloud:

 - Azure SQL (Microsoft, based on SQL Server)
 - Redshift (Amazon, based on PostgreSQL 8)

(Note: Redshift can also use a PostgreSQL driver but the
Redshift driver has significantly better performance.)

Cloud-native databases:

 - Hive 1
 - Hive 2

(Note: hive may be run on a vanilla Hadoop cluster, a Cloudera
cluster, or a Hortonworks cluster. The last two products may
offer custom JDBC drivers.)

(Note: this patch does not address Kerberos authentication
or SSL encryption.)

Data warehouse databases:

 - Impala
 - Snowflake
 - Teradata

Impala is part of the Hadoop ecosystem and provided by Cloudera.
Snowflake and Teradata are both commercial products.