Compile time option NO_ID

Some consider it good practice to obscure software version numbers to
clients.  Compiling with -DNO_ID removes the *.bind info structure.
This includes: version, author, copyright, cachesize, cache insertions,
evictions, misses & hits, auth & servers.

src/dnsmasq.h

@@ -286,6 +286,7 @@ struct naptr {
   struct naptr *next;
 };
 
+#ifndef NO_ID
 #define TXT_STAT_CACHESIZE     1
 #define TXT_STAT_INSERTS       2
 #define TXT_STAT_EVICTIONS     3
@@ -293,6 +294,7 @@ struct naptr {
 #define TXT_STAT_HITS          5
 #define TXT_STAT_AUTH          6
 #define TXT_STAT_SERVERS       7
+#endif
 
 struct txt_record {
   char *name;
@@ -1081,7 +1083,9 @@ void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_addre
 struct in_addr a_record_from_hosts(char *name, time_t now);
 void cache_unhash_dhcp(void);
 void dump_cache(time_t now);
+#ifndef NO_ID
 int cache_make_stat(struct txt_record *t);
+#endif
 char *cache_get_name(struct crec *crecp);
 char *cache_get_cname_target(struct crec *crecp);
 struct crec *cache_enumerate(int init);