DNS/KnotResolver/min_ttl-patchについて、ここに記述してください。

$ diff -c rrcache.c rrcache.c.orig 
*** rrcache.c   2015-11-01 13:55:58.362575632 +0900
--- rrcache.c.orig      2015-11-01 13:55:26.874574510 +0900
***************
*** 28,34 ****
  #include "lib/utils.h"
  
  #define DEBUG_MSG(qry, fmt...) QRDEBUG((qry), " rc ",  fmt)
! #define DEFAULT_MINTTL (120) /* Short-time "no data" retention to avoid bursts */
  
  /** Record is expiring if it has less than 1% TTL (or less than 5s) */
  static inline bool is_expiring(const knot_rrset_t *rr, uint32_t drift)
--- 28,34 ----
  #include "lib/utils.h"
  
  #define DEBUG_MSG(qry, fmt...) QRDEBUG((qry), " rc ",  fmt)
! #define DEFAULT_MINTTL (5) /* Short-time "no data" retention to avoid bursts */
  
  /** Record is expiring if it has less than 1% TTL (or less than 5s) */
  static inline bool is_expiring(const knot_rrset_t *rr, uint32_t drift)