Merge branch '206-nslookup-accepts-any-bogus-option-interpret-it-as-vc-v9_11' into 'v9_11'

Resolve "nslookup accepts any -bogus -option, interpret it as -vc"

See merge request !215

CHANGES

+4930.	[bug]		Remove a bogus check in nslookup command line
+			argument processing. [GL #206]
+
 4922.	[bug]		dnstap: Log the destination address of client
 			packets rather than the interface address. 
 			[GL #197]

bin/dig/nslookup.c

@@ -721,31 +721,31 @@ setoption(char *opt) {
 		usesearch = ISC_TRUE;
 	} else if (CHECKOPT("nodefname", 5)) {
 		usesearch = ISC_FALSE;
-	} else if (CHECKOPT("vc", 2) == 0) {
+	} else if (CHECKOPT("vc", 2)) {
 		tcpmode = ISC_TRUE;
 		tcpmode_set = ISC_TRUE;
-	} else if (CHECKOPT("novc", 4) == 0) {
+	} else if (CHECKOPT("novc", 4)) {
 		tcpmode = ISC_FALSE;
 		tcpmode_set = ISC_TRUE;
-	} else if (CHECKOPT("debug", 3) == 0) {
+	} else if (CHECKOPT("debug", 3)) {
 		short_form = ISC_FALSE;
 		showsearch = ISC_TRUE;
-	} else if (CHECKOPT("nodebug", 5) == 0) {
+	} else if (CHECKOPT("nodebug", 5)) {
 		short_form = ISC_TRUE;
 		showsearch = ISC_FALSE;
-	} else if (CHECKOPT("d2", 2) == 0) {
+	} else if (CHECKOPT("d2", 2)) {
 		debugging = ISC_TRUE;
-	} else if (CHECKOPT("nod2", 4) == 0) {
+	} else if (CHECKOPT("nod2", 4)) {
 		debugging = ISC_FALSE;
-	} else if (CHECKOPT("search", 3) == 0) {
+	} else if (CHECKOPT("search", 3)) {
 		usesearch = ISC_TRUE;
-	} else if (CHECKOPT("nosearch", 5) == 0) {
+	} else if (CHECKOPT("nosearch", 5)) {
 		usesearch = ISC_FALSE;
-	} else if (CHECKOPT("sil", 3) == 0) {
+	} else if (CHECKOPT("sil", 3)) {
 		/* deprecation_msg = ISC_FALSE; */
-	} else if (CHECKOPT("fail", 3) == 0) {
+	} else if (CHECKOPT("fail", 3)) {
 		nofail=ISC_FALSE;
-	} else if (CHECKOPT("nofail", 5) == 0) {
+	} else if (CHECKOPT("nofail", 5)) {
 		nofail=ISC_TRUE;
 	} else if (strncasecmp(opt, "ndots=", 6) == 0) {
 		set_ndots(&opt[6]);