v0.3.0

• Rename some config options for clarity, add a few new ones
• Security: redact bind passwords from logs
• New features:
  • Support for LDAP sub-queries
  • Support for custom variables in LDAP queries (for shorter config)
  • Support for adding static attributes per section
  • Built-in help for config options
  • Config file dump option for debugging
  • Support quoting in config file
  • Configurable attribute delimiter in response headers