Allow passwordless login in addition to usual login with password, when
creating 'root' user during install.
The effect of that change is that "local administrators" group are
allowed to connect as root user. This is done via gssapi authentication
plugin.
Clients that are not aware of gssapi client plugin, can still login with
password credentials.
To prevent ASAN heap-use-after-poison in the MDEV-16549 part of
./mtr --repeat=6 main.derived
the initialization of Name_resolution_context was cleaned up.
These tests produced different results in case they were run
with the option --ps-protocol.
These tests produced different result sets since a value of
Feature_subquery and handler_read_key status system variables
are updated one time more for ps-protocol (the first time it is updated
on Prepare phase and the second time on Execute phase of PS protocol)
So different result sets are expected for both tests. To make tests
successfully runnable both for case it is run with and without
the option --ps-protocol the new protocol combination [ps, nm]
and protocol specific result files have been added.
Moreover, the perl script mysql-test/mariadb-test-run.pl
has been updated to make the variable opt_ps_protocol visible
outside perl file containing this variable.
As a part of this MDEV following changes were made:
1) Mariadb named executables used instead of mysql named executables in scripts
2) renamed mysql-test-run and mysql-stress-test to mariadb-test-run and
mariadb-stress-test and created a symlink.
