backup domains not owned by a client

[ch604]

currently, domains not owned by a client are not backed up in client-level migrations, because the admin user doesnt back up nicely. implement this if this issue persists across additional tests:

admindomains=`mysql psa -u admin -p$(cat /etc/psa/.psa.shadow) -Ns -e 'SELECT c.login, d.name FROM clients AS c JOIN domains AS d ON d.cl_id = c.id;' | grep ^admin\s* | awk '{print $2}'`;  /usr/local/psa/bin/pleskbackup domains-name $admindomains -c --skip-logs --output-file=/var/migrationtemp/backup.admin.tar

[ch604]

should write a syncunowneddomains() command to match the syncclients() function, but for unowned domains only. see sysres wiki for the command needed. for the client list, ensure that 'admin' is not parsed.

[ch604]

added syncadmin() and an option for it to be called in subcheck. this depends on domain-level sync functions.

[ch604]

need to test this more