Remove code for caching SRV.

Function replaced by the ability to cache any RR type.

For backwards compatibilty SRV records are always on the
list of cacheable RR-types.

src/option.c

@@ -3446,7 +3446,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	break;
       }
 
-    case LOPT_FAST_RETRY:
+    case LOPT_FAST_RETRY: /* --fast-dns-retry */
       daemon->fast_retry_timeout = TIMEOUT;
       
       if (!arg)
@@ -3469,7 +3469,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	}
       break;
 
-    case LOPT_CACHE_RR:
+    case LOPT_CACHE_RR: /* --cache-rr */
       while (1) {
 	int type;
 	struct rrlist *new;
@@ -5184,7 +5184,7 @@ err:
 	break;
       }
 
-    case LOPT_STALE_CACHE:
+    case LOPT_STALE_CACHE: /* --use-stale-cache */
       {
 	int max_expiry = STALE_CACHE_EXPIRY;
 	if (arg)