[debian-mysql] Bug#798080: #798080 mysql-server-5.6: service stop hangs forever on systemd

[Spiros Gatzounas]

The problem went away after purging and installing again mysql-server 
and mysql-server-5.6 packages.

The problem returned back as soon as the file 
/etc/mysql/mysql.d.conf/mysqld.cnf was edited and line "log_error = 
/var/log/mysql/error.log" was commented out in order to allow logging to 
syslog as mysql suggests.