The Globe talks to some current liquor-license holders who object to a City Council proposal to increase the number of liquor licenses in the city because it might affect their investments in licenses - something made possible by the state cap on the number of licenses in the city. Of particular concern: A proposal to make some of the new licenses available citywide, rather than in places such as Mattapan, and the idea of letting developers of large malls get an unlimited number of licenses.