Bump Standards-Version to 3.9.3

From: Michael Prokop <mprokop@sipwise.com>

debian/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: Simon Horman <horms@debian.org>
 Uploaders: Michael Prokop <mprokop@sipwise.com>
 Build-Depends: debhelper (>= 5.0.37.2), libsnmp-dev, libglib2.0-dev, perl, net-tools, iputils-ping, python, psmisc, libnet1-dev, iproute, libtool, libcurl4-openssl-dev | libcurl3-openssl-dev, libxml2-dev, bison, flex, uuid-dev, lynx, libbz2-dev, zlib1g-dev, uuid-dev, libsensors4-dev, libltdl3-dev, swig, openssh-client, libgnutls-dev, python-central (>= 0.5), python-dev, libpam0g-dev, libncurses5-dev, psmisc, libopenhpi-dev
-Standards-Version: 3.7.3
+Standards-Version: 3.9.3
 XS-Python-Version: current
 
 Package: ldirectord-2