I wrote a column recently describing landlords as “underdogs,” which hit a nerve with a reader. I think it is important to explain the use of that word.In years past, the word “slumlord” was common in usage among Chicago area renters. It was used to describe landlords who did the absolute minimum permissible amount of property upkeep to allow tenants to occupy the property and have protection from the elements.“Slumlords” often do not provide adequate heat or protection from rodents …