[PATCH] fakeauth rename and libntlmauth API extensions

This is the fakeauth merger and upgrade.

  - renames fakeauth to ntlm_fake_auth
  - links ntlm_fake_auth to libntlmauth
  - removes duplicate code provided by libcompat and libntlmauth
  - moves the remaining bits of fakeauth/ntlm.h to ntlm_fake_auth.cc.

  - moves some of the basic NTLM operations into libntlmauth
     * fetch_string UNICODE support
     * make challenge packet
     * validate packet type
     * make challenge nonce
     * unpack user and domain from authenticate packet

  - tweaks libntlmauth to split the make challenge operation so that it
only generates the challenge object (does not encode blob for sending,
or hard-code field values any more).

  - tweaks the smb_lm helper which already linked libntlmauth so that it
uses the updated API correctly after the above changes.

  - documents libntlmauth and some of ntlm_fake_auth helper

Amos

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