Added: Several indexes (r277)

Quote from i-MSCP Github (1.5.3)

Code

1. Added: Several indexes (r277)
2. Fixed: Unwanted default values (r275)
3. Review: Switched from 'utf8' character set to 'utf8mb4' character set (r276)
4. Review: Switched from 'utf8_unicode_ci' collation to 'utf8mb4_unicode_ci' collation (r276)

Source: https://github.com/i-MSCP/imsc…b25d3f2f574060349fca2a19b