Enable hardened build flags. Closes: #664984

debian/control

@@ -7,6 +7,7 @@ Uploaders: Mario Iseli <mario@debian.org>, Matt Arnold <mattarnold5@gmail.com>,
 Build-Depends: debhelper (>= 7.0.50~),
     autotools-dev,
     expect,
+    hardening-wrapper,
     libgnutls-dev,
     po-debconf,
     procps,

debian/rules

@@ -1,5 +1,7 @@
 #!/usr/bin/make -f
 
+export DEB_BUILD_HARDENING=1
+
 override_dh_auto_configure:
 	dh_auto_configure -- \
 	    --host=$(DEB_HOST_GNU_TYPE) --build=$(DEB_BUILD_GNU_TYPE) \