HASH
int h = HASH(std->physaddr);
int h = HASH(a);
int h = HASH(sitd->physaddr);
int h = HASH(a);
HASH(statbuf.st_mtim.tv_sec, syscron_stat.st_mtim.tv_sec);
HASH(statbuf.st_mtim.tv_nsec, syscron_stat.st_mtim.tv_nsec);
%token FILENAME FORWARD FROM HASH HEADER HEADERLEN HOST HTTP ICMP INCLUDE INET
| HASH { $$ = KEY_OPTION_HASH; }
| HASH { $$ = RELAY_DSTMODE_HASH; }
{ "hash", HASH },