Make a number of changes to the encode-password tool:

- It is no longer necessary to specify the password storage scheme separately
  from the encoded value when comparing an encoded password. This makes this
  feature easier to use because it takes the data in the same format as is
  created by when encoding a clear-text password and as is stored in the
  directory.  Issue #971.

- When comparing a clear-text password against an encoded version, you can now
  use the --useCompareResultCode option to cause the tool to exit with a return
  code of COMPARE_TRUE or COMPARE_FALSE, which is more useful when calling the
  utility in a script.  Previously, it would always return zero to indicate
  that the script completed successfully, regardless of whether the provided
  password matched or not.  Issue #988.

- I've made the tool easier to call programmatically by adding additional
  methods that can be used to invoke it, by making it possible to avoid
  reinitializing the server, to provide alternate output and error streams (or
  eliminate the output entirely), and to return an integer value rather than
  using System.exit.  This all kind of falls under the umbrella of issue #987.