distrofiles: add astral user, astral group and unknown group

distro-files/etc/default/useradd

@@ -0,0 +1,8 @@
+GROUP=999
+HOME=/home
+INACTIVE=-1
+EXPIRE=
+SHELL=/usr/bin/bash
+SKEL=/etc/skel
+CREATE_MAIL_SPOOL=no
+LOG_INIT=yes

distro-files/etc/group

@@ -1,2 +1,4 @@
 root::0:root
 sshd::100:sshd
+unknown::999:unknown
+astral::999:astral

distro-files/etc/issue

@@ -1,3 +1,4 @@
 
+Password for the astral user is: astral
 Password for the root user is: root
 To start a graphical environment, run: startwm

distro-files/etc/passwd

@@ -1,2 +1,3 @@
 root:$6$Y60.qkhq.v3jWUVR$UyDvutrBYQNNhX1VvIrX2O7CcRPxuZ8EqyBktx7RG1nXzgXi7QHj3khzl14jxfKx45DpbVMIOXJziW2GqsOss.:0:0:root:/root:/usr/bin/bash
 sshd::100:100:sshd privsep:/var/lib/ssh:/usr/bin/false
+astral:$6$se/T4Wiigv5GmnhV$O0u5pgb57Oq5Of7.W5RkRFCjHsHFdqhnbWISKfv5n9REDUyKu0QsITlVQHG91ctn/PAxoYQ.d1HybLqFji3RH.:1000:1000::/home/astral:/usr/bin/bash