URL Identifiers

Supported URL prefixes::

  aftp://             Access using active FTP.
  bzr://              Fast access using the Bazaar smart server.
  bzr+ssh://          Fast access using the Bazaar smart server over SSH.
  file://             Access using the standard filesystem (default)
  ftp://              Access using passive FTP.
  http://             Read-only access of branches exported on the web.
  https://            Read-only access of branches exported on the web using SSL.
  sftp://             Access using SFTP (most SSH servers provide SFTP).
