Bug#1104519: liblemonldap-ng-common-perl: prompts for unmodified conffile

[Chris Hofstaedtler]

Package: liblemonldap-ng-common-perl
Version: 2.21.0+ds-2
Severity: serious

When upgrading a system from Debian bookworm to Debian trixie, with 
liblemonldap-ng-common-perl installed, the upgrade prompts for a 
conffile change. However that file was never modified in the first 
place, so prompting is inappropriate.

Command to reproduce below.

Setting up liblemonldap-ng-common-perl (2.21.0+ds-2) ...

Configuration file '/var/lib/lemonldap-ng/conf/lmConf-1.json'
  ==> File on system created by you or by a script.
  ==> File also in package provided by package maintainer.
    What would you like to do about it ?  Your options are:
     Y or I  : install the package maintainer's version
     N or O  : keep your currently-installed version
       D     : show the differences between the versions
       Z     : start a shell to examine the situation
  The default action is to keep your current version.
*** lmConf-1.json (Y/I/N/O/D/Z) [default=N] ? d
--- /var/lib/lemonldap-ng/conf/lmConf-1.json    2025-05-01 13:44:50.990212377 +0000
+++ /var/lib/lemonldap-ng/conf/lmConf-1.json.dpkg-new   2025-04-07 19:06:38.000000000 +0000
@@ -87,7 +87,7 @@
     "cfgAuthor" : "The LemonLDAP::NG team",
     "cfgDate" : "1627287638",
     "cfgNum" : 1,
-   "cfgVersion" : "2.16.1",
+   "cfgVersion" : "2.18.0",
     "cookieName" : "lemonldap",
     "demoExportedVars" : {
        "cn" : "cn",
@@ -116,7 +116,7 @@
     "localSessionStorage" : "Cache::FileCache",
     "localSessionStorageOptions" : {
        "cache_depth" : 3,
-      "cache_root" : "/var/lib/lemonldap-ng/cache",
+      "cache_root" : "/var/cache/lemonldap-ng",
        "default_expires_in" : 600,
        "directory_umask" : "007",
        "namespace" : "lemonldap-ng-sessions"
@@ -170,5 +170,6 @@
     "sessionDataToRemember" : {},
     "timeout" : 72000,
     "userDB" : "Same",
+   "webauthnDefaultTransports" : "usb, nfc, ble, internal",
     "whatToTrace" : "_whatToTrace"
  }

Configuration file '/var/lib/lemonldap-ng/conf/lmConf-1.json'
  ==> File on system created by you or by a script.
  ==> File also in package provided by package maintainer.
    What would you like to do about it ?  Your options are:
     Y or I  : install the package maintainer's version
     N or O  : keep your currently-installed version
       D     : show the differences between the versions
       Z     : start a shell to examine the situation
  The default action is to keep your current version.
*** lmConf-1.json (Y/I/N/O/D/Z) [default=N] ?


Reproducer:

   mmdebstrap --variant=apt --include=liblemonldap-ng-common-perl --chrooted-customize-hook='sed -e s/stable/testing/ -i /etc/apt/sources.list && apt update && apt dist-upgrade -y' stable /dev/null

Best,
Chris