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smtp: fix -t flag

--- a/sys/src/cmd/upas/smtp/smtp.c

+++ b/sys/src/cmd/upas/smtp/smtp.c

@@ -120,7 +120,8 @@

 	ARGBEGIN{

 	case 'a':

 		tryauth = 1;

-		trysecure = 1;

+		if(trysecure == 0)

+			trysecure = 1;

 		break;

 	case 'A':	/* autistic: won't talk to us until we talk (Verizon) */

 		autistic = 1;

@@ -150,7 +151,8 @@

 		ping = 1;

 		break;

 	case 's':

-		trysecure = 1;

+		if(trysecure == 0)

+			trysecure = 1;

 		break;

 	case 't':

 		trysecure = 2;

@@ -221,10 +223,8 @@

 	/* 10 minutes to get through the initial handshake */

 	atnotify(timeout, 1);

 	alarm(10*alarmscale);

-	if(trysecure > 1 && (rv = wraptls()) != nil)

+	if((rv = hello(hellodomain, 0)) != 0)

 		goto error;

-	if((rv = hello(hellodomain, trysecure > 1)) != 0)

-		goto error;

 	alarm(10*alarmscale);

 	if((rv = mailfrom(s_to_c(from))) != 0)

 		goto error;

@@ -474,6 +474,12 @@

 	char *ret, *s, *t;

 	if (!encrypted) {

+		if(trysecure > 1){

+			if((ret = wraptls()) != nil)

+				return ret;

+			encrypted = 1;

+		}

+

 		/*

 		 * Verizon fails to print the smtp greeting banner when it

 		 * answers a call.  Send a no-op in the hope of making it