First of all, I had to do dnf reinstall mariadb-libs, got libmysqlclient.so visible.
But still no go...

.config]$ cqrlog --debug=1

**** DEBUG LEVEL 1 ****

SSL libraries:
/usr/lib64/libssl.so.1.0.2m
/usr/lib64/libcrypto.so.1.0.2m
Loading libmysqlclient: /usr/lib64/mysql/libmysqlclient.so.18
**************************
MySQL version: 10.
**************************
**********************************
MySQL version assigned: 5.6
**********************************

Ctyfiles dir: /usr/share/cqrlog/ctyfiles/
Local ctyfiles dir: /home/jarmo/.config/cqrlog/ctyfiles/
Loaded 93636 LoTW users
Loaded 98114 eQSL users
Loaded 48268 SCP calls
*
User home directory: /home/jarmo/
Program home directory: /home/jarmo/.config/cqrlog/
Data directory: /home/jarmo/.config/cqrlog/database/
Memebers directory: /usr/share/cqrlog/members/
ZIP code directory: /usr/share/cqrlog/zipcodes/
Binary dir: /usr/bin/
Share dir: /usr/share/cqrlog/
TConnection to MySQL: 5.6
*
56 us states loaded
WARNING: obsolete call to RecreateWnd for TfrmDBConnect
Warning: TWinControl.DestroyHandle frmDBConnect:TfrmDBConnect Handle not Allocated
/usr/bin/mysqld_safe --defaults-file=/home/jarmo/.config/cqrlog/database/mysql.cnf --datadir=/home/jarmo/.config/cqrlog/database/ --socket=/home/jarmo/.config/cqrlog/database/sock --port=64000
Trying to connect to database
171117 12:24:49 mysqld_safe Logging to '/home/jarmo/.config/cqrlog/database//mysql.err'.
171117 12:24:49 mysqld_safe Starting mysqld daemon with databases from /home/jarmo/.config/cqrlog/database/
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:1
Trying to connect to database
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:2
Trying to connect to database
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:3
Trying to connect to database
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:4
Trying to connect to database
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:5
Trying to connect to database
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:6
Trying to connect to database
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:7
Trying to connect to database
Can not load default MySQL library ("libmysqlclient.so.18" or "libmysqlclient.so"). Check your installation.
Trying:8
WARNING: obsolete call to RecreateWnd for TfrmDbError
Warning: TWinControl.DestroyHandle frmDbError:TfrmDbError Handle not Allocated
Closing DXCluster window
Closing TRXControl window
Closing GrayLine window
Closing dDXCC
Closing dData
/home/jarmo/.config/cqrlog/database/localhost.localdomain.pid
Command:
kill 4477
Closing ini file ...