NEW YORK - The dream of owning a home is fading away for many Americans with less than stellar credit. On Tuesday HomeBanc Corp. said it will not issue any more loans, and Impac Mortgage Holdings Inc. shut down a type of loan called “alt-A” for people with limited documentation or slight credit issues. That followed bankruptcies for two of the country’s biggest home lenders — American Home Mortgage Investment Corp. and New Century Financial Corp. — and tighter terms at most other lenders that are thus far surviving a shakeout in the industry. “Every day I hear about a...