A......... [ZBX-7981] API "exists" methods are now deprecated
A......... [ZBX-7981] host.massupdate fixed validation when renaming host to an existing template
A......... [ZBX-7981] template.massupdate fixed validation when renaming template to an existing host
A......... [ZBX-7981] optimized several API create and updated methods to query existing names all at once instead of each iteration