Add a couple of statistics counters for LRU

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2005 d4fa192b-c00b-0410-8231-f00ffab90ce4

include/stat_field.h

@@ -61,6 +61,8 @@ MAC_STAT(n_wrk_overflow,	uint64_t, 'a', "N overflowed work requests")
 MAC_STAT(n_wrk_drop,		uint64_t, 'a', "N dropped work requests")
 
 MAC_STAT(n_expired,		uint64_t, 'i', "N expired objects")
+MAC_STAT(n_lru_nuked,		uint64_t, 'i', "N LRU nuked objects")
+MAC_STAT(n_lru_saved,		uint64_t, 'i', "N LRU saved objects")
 MAC_STAT(n_deathrow,		uint64_t, 'i', "N objects on deathrow")
 
 MAC_STAT(losthdr,		uint64_t, 'a', "HTTP header overflows")