Migration 202610280002 converts the Phase 17 url items through
models.ConvertLegacyItems: a relative path gets its leading slash,
spaces and the bytes " < > \ are percent-encoded, and a malformed item
no longer drops the whole definition. Each url item that cannot be
copied is logged at warn level with its label, value and reason.
BREAKING CHANGE: /sitemap.xsl is gone (404), the definitions screen and
the Phase 17 settings tile are replaced by the settings singleton, and
priority, change frequency, priority tiers and the update manifest are
no longer written or read. The config keys golem15.sitemap.cache_seconds
and golem15.sitemap.priority_tiers are removed; site_url, lastmod_ignore
and rebuild_delay_seconds are new.
- sitemap:import and sitemap:import-winter write the additional addresses
(and site_url, default_locale) instead of the definition
- the golem15_sitemap_definitions table stays in the database, unread
