Merge main 5.0 into 5.0-build

--require r/have_archive.require

--disable_query_log

show variables like "have_archive";

show variables like 'have_archive';

--enable_query_log

-- require r/have_bdb.require

disable_query_log;

show variables like "have_bdb";

show variables like 'have_bdb';

enable_query_log;

-- require r/have_big5.require

disable_query_log;

show collation like "big5_chinese_ci";

show collation like 'big5_chinese_ci';

enable_query_log;

-- require r/have_blackhole.require

disable_query_log;

show variables like "have_blackhole_engine";

show variables like 'have_blackhole_engine';

enable_query_log;

--require r/case_sensitive_file_system.require

--disable_query_log

show variables like "lower_case_file_system";

show variables like 'lower_case_file_system';

--enable_query_log