[CIFS] remove unused list, add new cifs sock list to prepare for mount/umount fix

Also adds two lines missing from the previous patch (for the need reconnect flag in the
/proc/fs/cifs/DebugData handling)

The new global_cifs_sock_list is added, and initialized in init_cifs but not used yet.
Jeff Layton will be adding code in to use that and to remove the GlobalTcon and GlobalSMBSession
lists.

CC: Jeff Layton <jlayton@redhat.com>
CC: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index 69a12aa..ba8723d 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -204,7 +204,7 @@
 		else
 			seq_printf(m, " type: %d ", dev_type);
 
-		if (tcon->tidStatus == CifsNeedReconnect)
+		if (tcon->need_reconnect)
 			seq_puts(m, "\tDISCONNECTED ");
 	}
 	read_unlock(&GlobalSMBSeslock);
@@ -311,7 +311,7 @@
 		i++;
 		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 		seq_printf(m, "\n%d) %s", i, tcon->treeName);
-		if (tcon->tidStatus == CifsNeedReconnect)
+		if (tcon->need_reconnect)
 			seq_puts(m, "\tDISCONNECTED ");
 		seq_printf(m, "\nSMBs: %d Oplock Breaks: %d",
 			atomic_read(&tcon->num_smbs_sent),