Rename dns_zone_forcereload() to dns_zone_forcexfr()

The new name describes the function more accurately.

(cherry picked from commit 63b8a75de9)

bin/named/server.c

@@ -10802,7 +10802,7 @@ named_server_retransfercommand(named_server_t *server, isc_lex_t *lex,
 		if (force) {
 			dns_zone_stopxfr(zone);
 		}
-		dns_zone_forcereload(zone);
+		dns_zone_forcexfr(zone);
 	} else {
 		(void)putstr(text, "retransfer: inappropriate zone type: ");
 		(void)putstr(text, dns_zonetype_name(type));

lib/dns/include/dns/zone.h

@@ -2007,9 +2007,9 @@ dns_zone_stopxfr(dns_zone_t *zone);
  */
 
 void
-dns_zone_forcereload(dns_zone_t *zone);
+dns_zone_forcexfr(dns_zone_t *zone);
 /*%<
- *      Force a reload of specified zone.
+ *      Force a zone transfer of the specified zone.
  *
  * Requires:
  *\li      'zone' to be a valid zone.

lib/dns/zone.c

@@ -19495,7 +19495,7 @@ dns_zone_stopxfr(dns_zone_t *zone) {
 }
 
 void
-dns_zone_forcereload(dns_zone_t *zone) {
+dns_zone_forcexfr(dns_zone_t *zone) {
 	REQUIRE(DNS_ZONE_VALID(zone));
 
 	if (zone->type == dns_zone_primary ||