Set default shell to zsh

debian/rules

@@ -45,8 +45,9 @@ execute_after_dh_installdirs:
 	dh_installdirs $(foreach d,$(USR_MERGE),usr/$(d))
 
 override_dh_auto_install:
-	install -p -m 644 etc/*      $(DESTDIR)/etc
-	install -p -m 755 motd/*     $(DESTDIR)/etc/update-motd.d
+	install -p -m 644 etc/*           $(DESTDIR)/etc
+	install -p -m 644 etc/default/*   $(DESTDIR)/etc/default
+	install -p -m 755 motd/*          $(DESTDIR)/etc/update-motd.d
 	install -p -m 644 licenses/* $(DESTDIR)/usr/share/common-licenses
 	install -p -m 644 origins/*  $(DESTDIR)/etc/dpkg/origins
 	install -p -m 644 share/*    $(DESTDIR)/usr/share/base-files

etc/adduser.conf

@@ -0,0 +1,24 @@
+# /etc/adduser.conf - configuration file for adduser(8) and addgroup(8)
+DSHELL=/bin/zsh
+DHOME=/home
+GROUPHOMES=no
+LETTERHOMES=no
+SKEL=/etc/skel
+SKEL_IGNORE_REGEX="dpkg-(old|new|dist|save)"
+FIRST_SYSTEM_UID=100
+LAST_SYSTEM_UID=999
+FIRST_SYSTEM_GID=100
+LAST_SYSTEM_GID=999
+FIRST_UID=1000
+LAST_UID=59999
+FIRST_GID=1000
+LAST_GID=59999
+USERGROUPS=yes
+USERS_GID=100
+DIR_MODE=0755
+SETGID_HOME=no
+QUOTAUSER=""
+NAME_REGEX="^[a-z][-a-z0-9_]*\$"
+SYSNAME_REGEX="^[a-z_][-a-z0-9_]*\$"
+ADD_EXTRA_GROUPS=0
+EXTRA_GROUPS=""

etc/default/useradd

@@ -0,0 +1,8 @@
+# Default values for useradd(8)
+SHELL=/bin/zsh
+GROUP=100
+HOME=/home
+INACTIVE=-1
+EXPIRE=
+SKEL=/etc/skel
+CREATE_MAIL_SPOOL=no