[JGIT PATCH 0/3] JGit in server side environment

I'm sending a series of the patches that make JGit more suitable for
usage in on the server-side environment, The patches do the following:
 * It is now possible to supply connection specific functionality for
SSH transports instead of using single global configuration
 * It is now easier to write a custom session factory that uses
~/.ssh/config for server-side environment

The patch consists from the following parts:
 * [JGIT PATCH 1/3] Changed Transport class hierarchy basing on
underlying transport
 * [JGIT PATCH 2/3] Moved common SSH related functionality to the base
class SshTransport
 * [JGIT PATCH 3/3] Extracted AWT-independent superclass from
DefaultSshSessionFactory

Constantine