* System fields renamed
* Removed row0ins.ic
* Removed row_update_for_mysql() wrapper

Reverted DICT_TF2_BITS (midenok)

encryption.innodb_lotoftables
encryption.innodb_encryption
funcs_1.is_columns_mysql

innodb.innodb-index-online-fk
innodb.instant_alter_debug
innodb.innodb_skip_innodb_is_tables
sys_vars.sysvars_server_notembedded
main.mysqld--help

Merge branch '10.3' into trunk

rec_get_offsets_func(): Relax a bogus debug assertion.
It would fail when we are operating on a copied prefix
of a node pointer record.

row_log_table_apply_op(): Remove references to dict_table_t::n_vcols.
Virtual column information is no longer being written to the log.

row_log_t: Remove the unused fields n_old_col, n_old_vcol.

MDEV-13723: Server crashes in ha_heap::find_unique_row or Assertion `0' failed in st_select_lex_unit::optimize with INTERSECT

With INTERSECT/EXCEPT fact that subquery item of IN/ALL/ANY was not assigned value does not mean that temporary table used for calculating unit is empty (records could be deleted).