net: add tcp_default_read_timeout and tcp_default_write_timeout and use them consistently

examples/buf_reader.v

@@ -3,19 +3,19 @@ import net
 import time
 import io
 
-// Make a new connection
-mut conn := net.dial_tcp('google.com:80')?
-// Simple http HEAD request for a file
-conn.write_str('GET /index.html HTTP/1.0\r\n\r\n')?
-// Make sure to set a timeout so we can wait for a response!
-conn.set_read_timeout(10 * time.second)
-// Wrap in a buffered reader
-mut r := io.new_buffered_reader(reader: io.make_reader(conn))
-for {
-	l := r.read_line() or {
-		break
+fn main() {
+	// Make a new connection
+	mut conn := net.dial_tcp('google.com:80')?
+	// Simple http HEAD request for a file
+	conn.write_str('GET /index.html HTTP/1.0\r\n\r\n')?
+	// Wrap in a buffered reader
+	mut r := io.new_buffered_reader(reader: io.make_reader(conn))
+	for {
+		l := r.read_line() or {
+			break
+		}
+		println('$l')
+		// Make it nice and obvious that we are doing this line by line
+		time.sleep_ms(10)
 	}
-	println('$l')
-	// Make it nice and obvious that we are doing this line by line
-	time.sleep_ms(10)
-}
+}