Add package dependencies

[altmas5]

Hi,

Maybe this goes more on the packaging side than on the source code side, or maybe some improvements can be done to check them on the module.
webmin-jailkit depends on:

• Config::IniFiles perl module, packaged as libconfig-inifiles-perl under Ubuntu and as perl-Config-IniFiles under OpenSUSE.
• jailkit itself.

If Config::IniFiles is missing you'll get:

500 - Error - Perl execution failed
Can't locate Config/IniFiles.pm in @INC (you may need to install the Config::IniFiles module) (@INC contains: /usr/share/webmin /etc/perl /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1 /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5 /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22 /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base . ..) at ./jailkit-lib.pl line 30. BEGIN failed--compilation aborted at ./jailkit-lib.pl line 30. Compilation failed in require at /usr/share/webmin/jailkit/index.cgi line 8.

On Ubuntu, if a dependency check is run against webmin-jailkit it shows perl, webmin and base, but the fact that not all of the dependencies are specified causes this issues with the module.

apt-rdepends webmin-jailkit
Reading package lists... Done
Building dependency tree       
Reading state information... Done
webmin-jailkit
  Depends: base
  Depends: perl
  Depends: webmin
  PreDepends: bash
  PreDepends: perl
base...

dpkg --info webmin-webmin-jailkit_0.7_all.deb
 new debian package, version 2.0.
 size 17960 bytes: control archive=1456 bytes.
     291 bytes,    12 lines      control              
     141 bytes,     6 lines      copyright            
    1896 bytes,    47 lines   *  postinst             #!/bin/sh
     742 bytes,    22 lines   *  preinst              #!/bin/sh
     926 bytes,    20 lines   *  prerm                #!/bin/sh
 Package: webmin-webmin-jailkit
 Version: 0.7
 Section: admin
 Priority: optional
 Architecture: all
 Essential: no
 Depends: base, perl, webmin
 Pre-Depends: bash, perl
 Installed-Size: 1
 Maintainer: joe@virtualmin.com
 Provides: webmin-webmin-jailkit
 Description: Webmin module Jailkit Jail Manager