Drop quiet from addgroup calls

Don't call addgroup with --quiet, so that if the "input"
group already exists as a non-system group you get a sensible error
message. Some broken tutorials forget the --system option.
Do the same when creating the systemd-journal group.

Closes: #769948
LP: #1455956
Closes: #762275

debian/changelog

@@ -2,6 +2,12 @@ systemd (215-17+deb8u4) UNRELEASED; urgency=medium
 
   [ Martin Pitt ]
   * debian/udev.prerm: Add missing "deconfigure" action. (Closes: #809744)
+  * udev.postinst: Don't call addgroup with --quiet, so that if the "input"
+    group already exists as a non-system group you get a sensible error
+    message. Some broken tutorials forget the --system option.
+    (Closes: #769948, LP: #1455956)
+  * systemd.postinst: Drop the --quiet from the addgroup calls as well, same
+    reason as above. (Closes: #762275)
 
   [ Michael Biebl ]
   * Make sure all swap units are ordered before the swap target. This avoids

debian/systemd.postinst

@@ -97,7 +97,7 @@ fi
 systemd-machine-id-setup
 
 # Setup system users and groups
-addgroup --quiet --system systemd-journal
+addgroup --system systemd-journal
 
 adduser --quiet --system --group --no-create-home --home /run/systemd \
     --gecos "systemd Time Synchronization" systemd-timesync

debian/udev.postinst

@@ -147,7 +147,7 @@ case "$1" in
     update_hwdb
 
     # Add new system group used by udev rules
-    addgroup --quiet --system input
+    addgroup --system input
 
     if [ -z "$2" ]; then # first install
       if ! chrooted && ! in_debootstrap; then