clear TLSconn before calling tlsClient.
this extends /n/sources/patch/httpfile-tlsconn-init
to cover all of /sys/src.

Reference: /n/sources/patch/tls-client-usage
Date: Sun Mar 23 15:53:18 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/vnc/vncv.c	Sun Mar 23 15:53:02 2014
+++ /sys/src/cmd/vnc/vncv.c	Sun Mar 23 15:53:01 2014
@@ -118,6 +118,7 @@
 	if(dfd < 0)
 		sysfatal("cannot dial %s: %r", addr);
 	if(tls){
+		memset(&conn, 0, sizeof conn);
 		dfd = tlsClient(dfd, &conn);
 		if(dfd < 0)
 			sysfatal("tlsClient: %r");
--- /sys/src/cmd/ip/httpfile.c	Sun Mar 23 15:53:05 2014
+++ /sys/src/cmd/ip/httpfile.c	Sun Mar 23 15:53:03 2014
@@ -186,7 +186,8 @@
 {
 	TLSconn conn;
 
-	if((fd=tlsClient(fd, &conn)) < 0)
+	memset(&conn, 0, sizeof conn);
+	if((fd = tlsClient(fd, &conn)) < 0)
 		sysfatal("tlsclient: %r");
 
 	if(conn.cert != nil)
--- /sys/src/cmd/ip/ftpfs/proto.c	Sun Mar 23 15:53:10 2014
+++ /sys/src/cmd/ip/ftpfs/proto.c	Sun Mar 23 15:53:07 2014
@@ -93,6 +93,7 @@
 		if(getreply(&ctlin, msg, sizeof(msg), 1) != Success)
 			fatal("bad auth tls");
 
+		memset(&conn, 0, sizeof conn);
 		ctlfd = tlsClient(ctlfd, &conn);
 		if(ctlfd < 0)
 			fatal("starting tls: %r");