Force to use rdiff-backup version 1.3.4nxd2-SlapOSPatched001 in backupserver SR

The recent changes in rdiff backup are not backward compatible.

component/rdiff-backup/buildout.cfg

@@ -25,7 +25,7 @@ find-links = http://pkgs.fedoraproject.org/repo/pkgs/rdiff-backup/rdiff-backup-1
 [rdiff-backup-build-1.3.4]
 <= rdiff-backup-build
 # use our own version
-find-links = http://www.nexedi.org/static/packages/source/rdiff-backup-1.3.4nxd6.tar.gz
+find-links = http://www.nexedi.org/static/packages/source/rdiff-backup-1.3.4nxd2.tar.gz
 patches =
   ${:_profile_base_location_}/rdiff-backup-1.3.4-librsync-1.0.0.patch#31fafc8bc4a00f002f52008a9f3b671f
 

software/backupserver/software.cfg

@@ -123,7 +123,7 @@ eggs =
 [versions]
 # 1.3.4nxdX is invalid version string, thus pached version string is not '1.3.4nxdX+SlapOSPatched001'
 # but '1.3.4nxdX-SlapOSPatched001'.
-rdiff-backup = 1.3.4nxd6-SlapOSPatched001
+rdiff-backup = 1.3.4nxd2-SlapOSPatched001
 gunicorn = 19.1.1
 plone.recipe.command = 1.1
 slapos.recipe.template = 2.4.2