Made a few links in README.md secure (https).

This bug is a regression caused by the code refactoring in
commit f5a833c3. It was not present
in any release of the MariaDB server. The bug affects table-rebuilding
ALTER TABLE when the source table is in ROW_FORMAT=REDUNDANT and
contains no virtual columns.

row_log_table_low_redundant(): Log virtual column data only if
virtual columns are present.

The issue was that r_loops, r_rows and r_filtered in ANALYZE FORMAT= JSON were not
calculated for the table on which we were performing the MRR scan in the BKA join
Fixed this by adding respective counter in the JOIN_TAB_SCAN_MRR::open and JOIN_TAB_SCAN_MRR::next

The problem is there is an overflow for the key_file_length.
Added the maximum limit for the key_file_length

The ALTER TABLE…IMPORT TABLESPACE adjustment code that was introduced by
WL#5522 in MySQL 5.6 is incorrectly invoking rec_get_status() on a
ROW_FORMAT=REDUNDANT record to determine if a record is a leaf page record.
The function rec_get_status(rec) is only to be called on
ROW_FORMAT=COMPACT, DYNAMIC or COMPRESSED records.

Implement Field_timestamp::save_in_field(timestamp_field)
that stores timestamp values without converting them to MYSQL_TIME
and back, because this conversion is lossy around DST change time.
This fixes main.old-mode test.

This is 10.2 version of f8a800be

Implement a special Copy_func function for timestamps, that copies
timestamps without converting them to MYSQL_TIME (the conversion is
lossy around DST change time).

This fixes ALTER TABLE part of main.old-mode test.

This is 10.2 version of f4f48e06

make insert NULL into a timestamp mark the field as having an
explicit value. So that the field won't be assigned the value
again in TABLE::update_default_field()

make Item_func_now_local::save_in_field(timestamp_field) not to go
through MYSQL_TIME - this conversion is lossy around DST change times.
This fixes inserting a default value into a timestamp field.

log_group_read_log_seg(): Only display the message during recovery,
not during normal operation. When the XtraDB configuration parameter
innodb_log_archive is set, this function will be called during
normal operation.

But without f4f48e06..f8a800be - fixes for MDEV-12672
and related issues. 10.2 specific fix follows...

don't do it via MYSQL_TIME, that conversion is lossy
around DST change dates.

Implement a special Copy_field method for timestamps, that copies
timestamps without converting them to MYSQL_TIME (the conversion
is lossy around DST change dates).

libmariadbclient_18 version nodes, specially for debian builds

followup for 378beed0 - only count WARN_LEVEL_ERROR,
not warnings or notes.

tabtyp was defined under ODBC_SUPPORT, but used
outside of it too (under JDBC_SUPPORT).

Even if cmake can find pkg-config (e.g the one supplied with strawberry perl
), we cannot link with pkg-config-found libraries or use the headers -they
are mingw, 32bit-only.

- Added missing test case for MyISAM

Node pointer recors contain dict_index_get_n_unique_in_tree_nonleaf(index)+1
instead of index->n_uniq+1 fields.

rec_get_offsets_func(): Remove the incorrect assertion. Later in
the function there are assertion for checking the exact field count.

don't prepare for checking view's CHECK OPTION, if
there is no CHECK OPTION in the first place.

Binlog_background_thread does not make a call to set_time(), And when
we call binlog_checkpoint_log_event->write() , we write the wrong timestamp.
In this patch we correct this by calling thd->set_time().

When the debug parameter 'bool leaf' was added to rec_get_offsets(),
also some debug assertions for reading the heap_no of ROW_FORMAT=REDUNDANT
records were added. However, the heap number is uninitialized when
offsets are being computed for to-be-inserted records.

For debug builds, initialize the heap number to a dummy value, so that
the record will be interpreted as 'user record'. The infimum and supremum
pseudo-records are never copied from the page frame and never inserted;
they are part of the page creation.

rec_convert_dtuple_to_rec_old(): Remove a bogus memset() in debug builds.

Problem:- To create file in /tmp dir mysqld require permission initrc_tmp_t.
And mysqld does not have his permission.

Solution:- Instead of giving mysqld permission of initrc_tmp_t , we redirected
log to file in /tmp dir through shell. I also removed a earlier workarround
in mysqld_safe.sh , which create tmp log file in datadir.

followup for b5ead3a6

libmariadb3 does not replace 10.1's libmariadbclient18 anymore,
but it still conflicts with it, both install dialog.so

This fixes a regression that only affects debug builds, caused by
commit 48192f96 which is necessary
preparation for MDEV-11369 instant ADD COLUMN. (Although that is a
10.3 task, to ease merges between 10.2 and 10.3, this change that
improves debug checks was pushed to 10.2 already.)

Unlike btr_pcur_restore_position(), rtr_cur_restore_position()
can create a search tuple out of a non-leaf page record. So,
we must pass 'bool leaf' parameter to dict_index_build_data_tuple().

dict_index_build_data_tuple(): Add a debug-only parameter 'bool leaf'.

rec_copy_prefix_to_dtuple(): Make the parameter debug-only.

row_sel_get_clust_rec_for_mysql(): In the debug code for spatial index,
remove an unnecessary call to buf_page_get_gen(), and use the already
latched block directly.

MDEV-13290: Assertion Assertion `!is_set() || (m_status == DA_OK_BULK && is_bulk_op())' or `! is_set()' failed

followup for 97c2a735 - don't use thd->is_error(),
the error could've been set before TABLE_LIST::cleanup_items.
Use the error handler to count errors.

This fixes rpl.rpl_row_binlog_max_cache_size - it was failing when
ER_STMT_CACHE_FULL happened duing multi-table update. Because
multi_update::abort_result_set() calls do_updates() to update
as much as possible, so one cannot rely on thd->is_error() after that.