dpkg(1): Document what --audit does nowadays

The checks performed now are more than just checking for partially
installed packages.

debian/changelog

@@ -36,6 +36,8 @@ dpkg (1.17.10) UNRELEASED; urgency=low
       Closes: #746973
     - Document that dpkg-buildpackage(1) -j argument is optional.
     - Add current and deprecated media types to deb(5).
+    - Document in dpkg(1) that --audit now does more than just searching for
+      partially installed packages.
   * Add support for automatic parallel job selection in dpkg-buildpackage,
     matching currently active processors, when using -jauto. Closes: #748012
   * Perl modules:

man/dpkg.1

@@ -23,7 +23,7 @@
 .\" You should have received a copy of the GNU General Public License
 .\" along with this program.  If not, see <https://www.gnu.org/licenses/>.
 .
-.TH dpkg 1 "2014-04-28" "Debian Project" "dpkg suite"
+.TH dpkg 1 "2014-05-23" "Debian Project" "dpkg suite"
 .SH NAME
 dpkg \- package manager for Debian
 .
@@ -247,9 +247,10 @@ uninstalled unavailable packages.
 Erase the existing information about what packages are available.
 .TP
 \fB \-C\fP, \fB\-\-audit\fP
-Searches for packages that have been installed only partially on your
-system. \fBdpkg\fP will suggest what to do with them to get them
-working.
+Performs database sanity and consistency checks on all packages.
+For example, searches for packages that have been installed only partially
+on your system or that have missing, wrong or obsolete control data or
+files. \fBdpkg\fP will suggest what to do with them to get them fixed.
 .TP
 \fB\-\-get\-selections\fP [\fIpackage-name-pattern\fP...]
 Get list of package selections, and write it to stdout. Without a pattern,