Changes

Changes from Mercurial (hg https://foss.heptapod.net/isa-afp/afp-devel/ default)

Changeset 14271:8fd1acd065c6 by fabian huch _huch@in.tum.de_: activate slow metadata checks by default;
The file was modified	`admin/sitegen`
The file was modified	`tools/afp_check_metadata.scala`