All variables handling sizes that were uint are now size_t.
  The variable connect_work_size is now ulong (was uint);
  Also make Json functiosn to allocate a larger memory (M=9 was 7)
  modified:   storage/connect/global.h
  modified:   storage/connect/ha_connect.cc
  modified:   storage/connect/json.cpp
  modified:   storage/connect/jsonudf.cpp
  modified:   storage/connect/plgdbutl.cpp
  modified:   storage/connect/plugutil.cpp
  modified:   storage/connect/user_connect.cc

- Fix uninitialised variable (pretty) in Json_File.
  Make Jbin_file accept the same arguments as Json_File ones.
  modified:   storage/connect/jsonudf.cpp

- Change the Level option to Depth (the word currently used)
  (Level being still accepted)
  modified:   storage/connect/mongo.cpp
  modified:   storage/connect/tabjson.cpp
  modified:   storage/connect/tabxml.cpp

- Suppress 2nd argument default value for MYSQLtoPLG function
  modified:   storage/connect/myutil.h

- Allow REST tables to be create not specifying a file_name
  modified:   storage/connect/tabrest.cpp

  modified:   storage/connect/filamdbf.cpp
  modified:   storage/connect/filamdbf.h
  modified:   storage/connect/filamzip.cpp
  modified:   storage/connect/filamzip.h
  modified:   storage/connect/ha_connect.cc
  modified:   storage/connect/plgxml.cpp
  modified:   storage/connect/tabdos.cpp
  modified:   storage/connect/tabdos.h
  modified:   storage/connect/tabfix.h

- Add/Init Level class member
  modified:   storage/connect/mongo.cpp
  modified:   storage/connect/mongo.h
  modified:   storage/connect/tabjson.cpp
  modified:   storage/connect/tabjson.h

- Typo
  modified:   storage/connect/connect.cc

  and enable using special column in them.
  modified:   storage/connect/tabzip.cpp
  modified:   storage/connect/tabzip.h

- Fix some compiler errors
  modified:   storage/connect/tabcmg.cpp

- Fix https://stackoverflow.com/questions/60625778/import-complex-xml-from-multiple-files-in-mariadb/60637429#60637429
  Import complex XML from multiple files in MariaDB
  Some row results are missing and replaced by the last file one.
  Thats because Nx and Sx column members are not reset when changing file.
  modified:   storage/connect/tabxml.cpp
  modified:   storage/connect/tabxml.h

  Failed compile when XML table type is not supported.
  Was because XMLDEF was unconditionally called from REST table.
  modified:   storage/connect/tabrest.cpp

- Make cmake less verbose
  modified:   storage/connect/CMakeLists.txt

- Hide Switch_to_definer_security_ctx not defined for 10.1 and 10.0
  modified:   storage/connect/ha_connect.cc

  Problem with NOT LIKE queries.
  modified:   storage/connect/ha_connect.cc
  modified:   sql/item_cmpfunc.h

- Fix MDEV-21084
  Misusage of strncat could cause buffer overflow.
  modified:   storage/connect/reldef.cpp
  modified:   storage/connect/tabcmg.cpp
  modified:   storage/connect/tabjson.cpp
  modified:   storage/connect/tabrest.cpp
  modified:   storage/connect/tabxml.cpp

---------------------------------------------------------
- Temporarily fix MDEV-13782 by commenting out LIKE_FUNC in CondFilter
  modified:   storage/connect/ha_connect.cc

- Remove use of hack tables
  modified:   storage/connect/connect.cc
  modified:   storage/connect/connect.h
  modified:   storage/connect/ha_connect.cc
  modified:   storage/connect/xtable.h

---------------------------------------------------------
- Temporarily fix MDEV-13782 by commenting out LIKE_FUNC i, CondFilter
  modified:   storage/connect/ha_connect.cc

- Make Rest available for MariaDB binary distributed versions.
  modified:   storage/connect/CMakeLists.txt

- Remove unused declaration
  modified:   storage/connect/filter.h

The fix consists of three commits backported from 10.3:

1) Cleanup isnan() portability checks

(cherry picked from commit 7ffd7fe9)

2) Cleanup isinf() portability checks

Original problem reported by Wlad: re-compilation of 10.3 on top of 10.2
build would cache undefined HAVE_ISINF from 10.2, whereas it is expected
to be 1 in 10.3.

std::isinf() seem to be available on all supported platforms.
(cherry picked from commit bc469a0b)

3) Use std::isfinite in C++ code

This is addition to parent revision fixing build failures.

(cherry picked from commit 54999f4e)

buf_read_ibuf_merge_pages(): Discard any page numbers that are
outside the current bounds of the tablespace, by invoking the
function ibuf_delete_recs() that was introduced in MDEV-20934.
This could avoid an infinite change buffer merge loop on
innodb_fast_shutdown=0, because normally the change buffer merge
would only be attempted if a page was successfully loaded into
the buffer pool.

dict_drop_index_tree(): Add the parameter trx_t*.
To prevent the DROP TABLE crash, do not invoke btr_free_if_exists()
if the entire .ibd file will be dropped. Thus, we will avoid a crash
if the BTR_SEG_LEAF or BTR_SEG_TOP of the index is corrupted,
and we will also avoid unnecessarily accessing the to-be-dropped
tablespace via the buffer pool.

In MariaDB 10.2, we disable the DROP TABLE fix if innodb_safe_truncate=0,
because the backup-unsafe MySQL 5.7 WL#6501 form of TRUNCATE TABLE
requires that the individual pages be freed inside the tablespace.

This new CONNECT version 1.07 fully implements NOSQL support.
It allows working on JSON or XML data retrieved as REST query results
from all binary distributions of MariaDB when cpprestsdk is installed
and the GetRest library is available.
=====================================================================
- Make Rest available for MariaDB binary distributed versions.
  Change RestGet function so it can be called from a library.
  modified:   storage/connect/CMakeLists.txt
  modified:   storage/connect/restget.cpp
  modified:   storage/connect/tabrest.cpp

- Make column FLAG option available to discovery functions.
  modified:   storage/connect/ha_connect.cc
  modified:   storage/connect/plgdbsem.h

- Update CONNECT version number and date.
  modified:   storage/connect/ha_connect.cc

- Move OEMColumns function from mycat.cc to reldef.cpp.
  modified:   storage/connect/mycat.cc
  modified:   storage/connect/reldef.cpp

- Allocate tables as TABREF (was RELDEF)
  modified:   storage/connect/mycat.cc
  modified:   storage/connect/mycat.h

- Fix MDEV-20845 by commenting out TIMEOUT setting.
  modified:   storage/connect/myconn.cpp

- Call DefineAM before calling GetColCatInfo. Column offset
  is now based on record format instead of table type.
  The RECFM_VCT format was added.
  This enables tables to specify the record format and is
  useful in particular for OEM tables.
  modified:   storage/connect/plgdbsem.h
  modified:   storage/connect/reldef.cpp
  modified:   storage/connect/reldef.h
  modified:   storage/connect/tabdos.cpp
  modified:   storage/connect/tabdos.h
  modified:   storage/connect/tabfix.cpp
  modified:   storage/connect/tabfmt.cpp
  modified:   storage/connect/tabmysql.cpp
  modified:   storage/connect/tabutil.cpp
  modified:   storage/connect/tabutil.h
  modified:   storage/connect/tabvct.cpp
  modified:   storage/connect/xindex.cpp

using create_w_max_indexes_64.result as a template

Move row size check to early CREATE/ALTER TABLE phase. Stop checking
on table open.

dict_index_add_to_cache(): remove parameter 'strict', stop checking row size

dict_index_t::record_size_info_t: this is a result of row size check operation

create_table_info_t::row_size_is_acceptable(): performs row size check.
Issues error or warning. Writes first overflow field to InnoDB log.

create_table_info_t::create_table(): add row size check

dict_index_t::record_size_info(): this is a refactored version
of dict_index_t::rec_potentially_too_big(). New version doesn't change global
state of a program but return all interesting info. And it's callers who
decide how to handle row size overflow.

dict_index_t::rec_potentially_too_big(): removed

memo_block_unfix(), memo_latch_release(): Merge to ReleaseLatches.

memo_slot_release(), ReleaseAll: Clean up the formatting.

A search with PAGE_CUR_GE may land on the supremum record on
a leaf page that is not the rightmost leaf page.
This could occur when all keys on the current page are
smaller than the search key, and the smallest key on the
successor page is larger than the search key.

ibuf_delete_recs(): Correct the debug assertion accordingly.

Closes #1407

mtr_t::Impl, mtr_t::Command: Merge to mtr_t.

MTR_MAGIC_N: Remove.

MTR_STATE_COMMITTING: Remove. This state was only being set
internally during mtr_t::commit().

mtr_t::Command::m_locks_released: Remove (set-and-never-read member).

mtr_t::Command::m_start_lsn: Replaced with the return value of
finish_write() and a parameter to release_blocks().

mtr_t::Command::m_end_lsn: Removed as a duplicate of mtr_t::m_commit_lsn.

mtr_t::Command::prepare_write(): Replace a switch () with a
comparison against 0. Only 2 m_log_mode are allowed.

Avoid creating std::vector, and use single instead of double traversal.

Problem:
========
CURRENT_TEST: binlog_encryption.rpl_corruption

mysqltest: In included file "./include/wait_for_slave_io_error.inc":
...
At line 72: Slave stopped with wrong error code
**** Slave stopped with wrong error code: 1743 (expected 1595,1913) ****

Analysis:
========
The test emulates the corruption at the various stages of replication for
example in binlog file, in network and in relay log etc. It verifies that all
corruption cases are handled through appropriate error messages.

The test cases which emulate network failure expect following errors.
--ER_SLAVE_RELAY_LOG_WRITE_FAILURE (1595)
--ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE (1743)

Ideally test should expect error codes as 1595 and 1743.
But the test actually waits on incorrect error code 1595,1913

Fix:
===
Added appropriate error code for 'ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE'.
Replaced 1913 with 1743.

The XDES_CLEAN_BIT is always set for every element of
the page allocation bitmap in the extent descriptor pages.
Do not bother touching it, to avoid redundant writes.

The DICT_HDR_MAX_SPACE_ID was already zero-initialized at page allocation.

page_rec_write_field(): Remove.

dict_create_index_tree_step(): If the SYS_INDEXES.PAGE does not change,
do not update it in the data dictionary. Typically, all index page numbers
would be unchanged before and after IMPORT TABLESPACE, except if some
secondary indexes were created after loading some data.

btr_root_fseg_adjust_on_import(): Remove the redundant mtr_t* parameter.
Redo logging is disabled during the page adjustments that IMPORT TABLESPACE
is performing.

The root page must never have any siblings, so it is unnecessary
to clear those fields.

fsp_alloc_seg_inode_page(): Ever since
commit 3926673c
all newly allocated pages are zero-initialized.
Assert that this is the case for the FSEG_ID fields.

btr_store_big_rec_extern_fields(): Remove the redundant initialization
of the most significant 32 bits of BTR_EXTERN_LEN. InnoDB never supported
BLOBs that are longer than 4GiB. In fact, dtuple_convert_big_rec()
would write emit an error message if a clustered index record tuple would
exceed 1,000,000,000 bytes in length.

The BTR_EXTERN_LEN in the BLOB pointers in clustered index leaf page
records is zero-initialized at least since
commit 41bb3537