libvirt-bin.default: add keytab default

debian/libvirt-bin.default

@@ -4,6 +4,8 @@
 # Start libvirtd to handle qemu/kvm:
 start_libvirtd="yes"
 
-# options passed to libvirtd
+# options passed to libvirtd, add "-l" to listen on tcp
 libvirtd_opts="-d"
 
+# pass in location of kerberos keytab
+#export KRB5_KTNAME=/etc/libvirt/libvirt.keytab