Backport binary TOUCH/GAT/GATQ commands

Taken from the 1.6 branch, partly written by Trond. I hope the CAS handling is
correct.

1 files changed, 1 insertions, 0 deletions

diff --git a/items.h b/items.h
index fee5f79..447aeed 100644
--- a/items.h
+++ b/items.h
@@ -21,5 +21,6 @@ void do_item_flush_expired(void);
 
 item *do_item_get(const char *key, const size_t nkey);
 item *do_item_get_nocheck(const char *key, const size_t nkey);
+item *do_item_touch(const char *key, const size_t nkey, uint32_t exptime);
 void item_stats_reset(void);
 extern pthread_mutex_t cache_lock;