Also try runsystem.gnu, in case /etc/alternatives/runsystem is hosed.

---
 daemons/console-run.c |    7 +++++++
 startup/startup.c           |   24 ++++++++++++++++++++----
 2 files changed, 27 insertions(+), 4 deletions(-)

Index: hurd-debian/startup/startup.c
===================================================================
--- hurd-debian.orig/startup/startup.c	2012-11-26 00:23:25.000000000 +0000
+++ hurd-debian/startup/startup.c	2012-11-26 00:25:06.000000000 +0000
@@ -1087,6 +1087,7 @@
   static const char *const tries[] =
   {
     "/libexec/runsystem",
+    "/libexec/runsystem.gnu",
     _PATH_BSHELL,
     "/bin/shd",			/* XXX */
   };