Support for Multiple SSH Keys via .ssh/config
Review Request #2391 — Created June 2, 2011 and discarded
This patch allows paramiko to honor the IdentityFile settings for a host that have been set in the user's .ssh/config file.
Tested on a system without a .ssh/config file, on a system with a blank .ssh/config file, and on a system with a .ssh/config file with the appropriate settings for a host.