debian: Reword libdpkg-perl description and only list public modules

Let's not confuse possible users of what they might be able to use.

debian/changelog

@@ -4,6 +4,7 @@ dpkg (1.17.1) UNRELEASED; urgency=low
     - Make explicit that dpkg-shlibdeps -e can be used multiple times.
   * Add manpages-it Replaces to dpkg due to new translated man pages.
     Reported by Alessio Gaeta <alga777@gmail.com>.
+  * Reword libdpkg-perl description and only list public modules.
 
  -- Guillem Jover <guillem@debian.org>  Sat, 27 Jul 2013 05:32:21 +0200
 

debian/control

@@ -73,22 +73,25 @@ Breaks: dpkg-dev (<< 1.15.6)
 Replaces: dpkg (<< 1.15.8), dpkg-dev (<< 1.15.6)
 Description: Dpkg perl modules
  This package provides the perl modules used by the scripts
- in dpkg-dev. They cover a wide range of functionalities. Among them
- there are the following modules:
+ in dpkg-dev. They cover a wide range of functionality. Among them
+ there are the following public modules:
  .
-  - Dpkg::Arch: manipulate Debian architecture information
+  - Dpkg::BuildFlags: set, modify and query compilation build flags
   - Dpkg::BuildOptions: parse and manipulate DEB_BUILD_OPTIONS
   - Dpkg::Changelog: parse Debian changelogs
   - Dpkg::Checksums: generate and parse checksums
   - Dpkg::Compression::Process: wrapper around compression tools
   - Dpkg::Compression::FileHandle: transparently (de)compress files
+  - Dpkg::Conf: parse dpkg configuration files
   - Dpkg::Control: parse and manipulate Debian control information
     (.dsc, .changes, Packages/Sources entries, etc.)
   - Dpkg::Deps: parse and manipulate dependencies
-  - Dpkg::ErrorHandling: common error functions
+  - Dpkg::Gettext: wrapper around Locale::gettext
+  - Dpkg::IPC: spawn sub-processes and feed/retrieve data
   - Dpkg::Index: collections of Dpkg::Control (Packages/Sources files for
     example)
-  - Dpkg::IPC: spawn sub-processes and feed/retrieve data
+  - Dpkg::Path: common path handling functions
+  - Dpkg::Source::Package: extract Debian source packages
   - Dpkg::Substvars: substitute variables in strings
   - Dpkg::Vendor: identify current distribution vendor
   - Dpkg::Version: parse and manipulate Debian package versions