next server in the list. For a cluster of N elements, all N servers must
be defined in redis_servers.
+GF/02 Catch and remove uninitialized value warning in exiqsumm
+ Check for existence of @ARGV before looking at $ARGV[0]
+
JH/01 Replace the store_release() internal interface with store_newblock(),
which internalises the check required to safely use the old one, plus
the allocate and data copy operations duplicated in both (!) of the