[CentOS] C6 : "extra" file access permission ?

Sun Sep 21 22:36:26 UTC 2014
Always Learning <centos at u62.u22.net>

In C5.10 when I do a "ls -al" (or .l as I am lazy) I see:-

drwxr-xr-x   2 root root  4096 Dec  4  2013 alias


In C6.5 (2.6.32-431.23.3.el6.x86_64) I see:-

drwxr-xr-x.  2 root root 4096 Sep  9 04:26 conf
drwxrwxrwt.  4 root root 4096 Sep 21 03:39 tmp
drwxr-xr-x.  9 root root 4096 Sep  9 04:26 spool
lrwxrwxrwx.  1 root root   10 Sep  8 21:45 mail -> spool/mail

I have never noticed the "extra dot" before.

QUESTION

What does the extra dot (.) signify ?

Thank you,

Paul

(Supporting Yes for Scotland)