Updates from Samba HEAD:

Updates from Samba HEAD:

 - Fix segfaults in the 'net ads' commands when no password is provided
 - Readd --with-ldapsam for 2.2 compatability.  This conditionally compiles the
   old options, but the actual code is available on all ldap systems.
 - Fix shadow passwords (as per work with vl)
 - Fix sending plaintext passwords to unicode servers (again vl)
 - Add a bit of const to secrets.c functions
 - Fix some spelling and grammer by vance.
 - Document the -r option in smbgroupedit.

There are more changes in HEAD, I'm only merging the changes I've been involved
with.

Andrew Bartlett
(This used to be commit 83973c389355a5cc9ca74af467dfd8b5dabd2c8f)