[Samba] ADMIN$ share? What's this

[Christian Barth]

Hi,

I recently did a update form 2.0.7 to 2.2.3a. All run smooth. When 
doing a "smbclient -L server" I now see a ADMIN$ share. What's this, 
what is it for?

Thanks

Christian

               _(_)_                          wWWWw   _
   @@@@       (_)@(_)   vVVVv     _     @@@@  (___) _(_)_
  @@()@@ wWWWw  (_)\    (___)   _(_)_  @@()@@   Y  (_)@(_)
   @@@@  (___)     `|/    Y    (_)@(_)  @@@@   \|/   (_)\
    /      Y       \|    \|/    /(_)    \|      |/      |
 \ |     \ |/       | / \ | /  \|/       |/    \|      \|/
jgs|//   \\|///  \\\|//\\\|/// \|///  \\\|//  \\|//  \\\|// 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^