added basic postinst script to enable / disable Apache modules and sites

debian/postinst

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+set -e
+
+# don't do anything when called with other argument than configure
+case "$1" in
+  configure)
+  ;;
+  abort-upgrade|abort-remove|abort-deconfigure)
+    exit 0
+  ;;
+  *)
+    echo "postinst called with unknown argument \$1'" >&2
+    exit 1
+  ;;
+esac
+
+. /usr/share/debconf/confmodule
+
+# enable required modules
+a2enmod ssl perl
+
+# enable optional modules
+a2enmod dump_io || echo "Missing some optional Apache module(s), ignoring."
+
+# disable debian's default Apache site
+a2dissite default
+
+exit 0