patch mdb_var_alloc

*** 1561,1575 ****
           * Not all objects have CTF and label data, so set version to "Unknown".
           */
          if (version == NULL)
                  version = "Unknown";
  
-         /*
-          * The hash table implementation in OVERLOAD mode limits the version
-          * name to 31 characters because we cannot specify an external name.
-          * The full version name is available via the ::objects dcmd if needed.
-          */
          (void) mdb_nv_insert(vers_nv, version, NULL, (uintptr_t)objname,
              MDB_NV_OVERLOAD);
  
          return (0);
  }
--- 1561,1570 ----