Multiple changes:

Multiple changes:
- Get rid of improper "Invalid option: d (100)" message when setting
  debug from commandline.
- Eliminate got_pass global and only use opt_password.  This enables
  re-use of password that may have been enetered in failed ads connect.
- Auto-detect method for net user command
- use new net_ads_check rather than lp_security==ADS test on net join
- Get rid of annoying debug level 0's
(This used to be commit 1280968000595c28ed62d9e74acecfdc84e33710)