Debian: Use tasksel --new-install

This switch makes tasksel include the "standard system utilities" task.

Unfortunately, it also defaults to installing a desktop environment, so
we need to warn users about that.

Co-authored-by: Marcello Mamino <m2@ciovil.li>
Signed-off-by: Richard Laager <rlaager@wiktel.com>

docs/Getting Started/Debian/Debian Bullseye Root on ZFS.rst

@@ -1008,7 +1008,10 @@ Step 8: Full Software Installation
 
 #. Install a regular set of software::
 
-     tasksel
+     tasksel --new-install
+
+   **Note:** This will check "Debian desktop environment" and "print server"
+   by default.  If you want a server installation, unselect those.
 
 #. Optional: Disable log compression:
 

docs/Getting Started/Debian/Debian Buster Root on ZFS.rst

@@ -986,7 +986,10 @@ Step 8: Full Software Installation
 
 #. Install a regular set of software::
 
-     tasksel
+     tasksel --new-install
+
+   **Note:** This will check "Debian desktop environment" and "print server"
+   by default.  If you want a server installation, unselect those.
 
 #. Optional: Disable log compression:
 

docs/Getting Started/Debian/Debian Stretch Root on ZFS.rst

@@ -900,6 +900,9 @@ Step 8: Full Software Installation
 
   # tasksel
 
+**Note:** This will check "Debian desktop environment" and "print server"
+by default.  If you want a server installation, unselect those.
+
 8.3 Optional: Disable log compression:
 
 As ``/var/log`` is already compressed by ZFS, logrotate’s compression is