Add systemd-bus-proxy system user so systemd-bus-proxyd can properly drop its privileges

debian/changelog

@@ -37,6 +37,8 @@ systemd (215-1) UNRELEASED; urgency=medium
     warning messages about the missing home directories. Those are created
     dynamically during runtime. (Closes: #759175)
   * Set the gecos field when creating the system users.
+  * Add systemd-bus-proxy system user so systemd-bus-proxyd can properly drop
+    its privileges.
 
  -- Michael Biebl <biebl@debian.org>  Tue, 26 Aug 2014 12:09:10 +0200
 

debian/systemd.postinst

@@ -112,6 +112,8 @@ adduser --quiet --system --group --no-create-home --home /run/systemd/netif \
     --gecos "systemd Network Management" systemd-network
 adduser --quiet --system --group --no-create-home --home /run/systemd/resolve \
     --gecos "systemd Resolver" systemd-resolve
+adduser --quiet --system --group --no-create-home --home /run/systemd \
+    --gecos "systemd Bus Proxy" systemd-bus-proxy
 
 # Initial update of the Message Catalogs database
 _update_catalog