lshd: Use `lsh-pam-checkpw' as the password helper program.

This finally allows users to log in using password authentication.

svn path=/nixos/trunk/; revision=13490

etc/default.nix

@@ -226,7 +226,6 @@ import ../helpers/make-etc.nix {
       "shadow"
       "sshd"
       "lshd"
-      "lsh-pam-checkpw"
       "useradd"
       "chsh"
       "xlock"

etc/pam.d/lsh-pam-checkpw

@@ -1,4 +0,0 @@
-auth     include        common
-account  include        common
-password include        common
-session  include        common

upstart-jobs/lshd.nix

@@ -31,6 +31,7 @@ start script
 end script
 
 respawn ${lsh}/sbin/lshd --daemonic \
+   --password-helper="${lsh}/sbin/lsh-pam-checkpw" \
    -p ${toString portNumber} \
    ${if interfaces == [] then ""
      else (concatStrings (map (i: "--interface=\"${i}\"")