• Add Docker image variant for arm32v7
• Add theme variants
  • Use CSS variables instead of inherence
  • Rename default theme to "Light - Serif"
  • Rename Black theme to "Dark - Serif"
  • Rename "Sans-Serif" theme to "Light - Sans Serif"
  • Add "System" theme that use system preferences: Dark or Light
  • Add Serif and Sans-Serif variants for each color theme
• Avoid constraint error when having duplicate entries during feed creation
• Disable strict XML parsing
• Ignore invalid content type
• Update man page
• Replace Travis by GitHub Actions
• Rename cleanup config variables and deprecate old ones
  • CLEANUP_FREQUENCY_HOURS instead of CLEANUP_FREQUENCY
  • CLEANUP_ARCHIVE_READ_DAYS instead of ARCHIVE_READ_DAYS
• Make configurable the number of days to remove old sessions
• Add native lazy loading for images and iframes
• Do not buffer responses in the image proxy
• Update dependencies
• Add Go 1.13 to test matrix
• Replace link border by outline to avoid slight content shift
• New rewrite function: add_mailto_subject
• Import OPML from URL
• Fix HTML injection in addImageTitle
• Accept HTML entities when parsing XML