5.1.5

• Improved ConfigParser
• Improved docs for group install and group remove
• Fix man pages deployment
• Update API doc related to keepcache
• Implement rhsm (Red Hat Subscription Manager) plugin
• Document --dump-variables
• Implement dnf5 --dump-variables
• Improve contributing guidelines: don't mention "ready-for-review"
• Allow specifying upper-case tags in repoquery --queryformat
• api: Make get_base_arch() public
• Improve input for large epochs that don't fit into time_t