r5495: * add in some code from Mike Nix <mnix@wanm.com.au> for the SMBsplopen

r5495: * add in some code from Mike Nix <mnix@wanm.com.au> for the SMBsplopen
  and SMBsplclose commands (BUG 2010)
* clarify some debug messages in smbspool (also from Mike)

my changes:

* start adding msdfs client routines
* enable smbclient to maintain multiple connections
* set the CAP_DFS flag for our internal clienht routines.

I actualy have a dfs referral working in do_cd() but that code
is too ugly to live so I'm not checking it in just yet.
Further work is to merge with vl's changes in trunk to support multiple
TIDs per cli_state *.