chsh.ldap crashes in ask_shell

[Daniel Danger]

When calling chsh.ldap as a normal user (user info is stored in ldap) I get promted for my password an then chsh.ldap crashes with the following output:

Traceback (most recent call last):
  File "/usr/bin/chsh.ldap", line 80, in <module>
    main()
  File "/usr/bin/chsh.ldap", line 69, in main
    shell = ask_shell(user.shell)
  File "/usr/bin/chsh.ldap", line 50, in ask_shell
    shell = input(' Login Shell [%s]: ' % oldshell)
UnboundLocalError: local variable 'input' referenced before assignment

I believe, this was fixed upstream with this commit: https://github.com/arthurdejong/nss-pam-ldapd/commit/1025d5de336d8c9585b79df3154b5649da344281

$ lsb_release -rd
Description: Ubuntu 20.04.1 LTS
Release: 20.04

$ apt-cache policy nslcd-utils
nslcd-utils:
  Installiert: 0.9.11-1
  Installationskandidat: 0.9.11-1
  Versionstabelle:
 *** 0.9.11-1 500
        500 http://archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu focal/universe i386 Packages
        100 /var/lib/dpkg/status