v2022.06.25

Upstream changes

• schema: don't use 'create index if not exists' syntax because mysql doesn't support it
• experimental, af_psql_trgm: attempt to pseudo-normalize returned mysql score values by dividing by match length
• implement native fulltext search on mysql
• schema: add fulltext indexes for mysql to support af_psql_trgm and possibly future fulltext search
• af_psql_trgm: add support for querying against mariadb FULLTEXT indexes
• Merge branch 'weblate-integration'
• Translated using Weblate (Ukrainian)