IMPROVEMENTS:

• Add more upfront validations #162.
• Allow customizing request delay interval and maximum number of retries #157.

FEATURES:

• Add TLS/SSL certificate resource and data source #156.
• Add MS SQL server resource #161.
• Add MariaDB resource #164.

BUG FIXES:

• Fix Loadbalancer rs/ds docs (add missing descriptions, fix typo, etc.) #156.