net/os: deprecate write_str() in favor of write_string()

vlib/net/tcp.v

@@ -67,10 +67,16 @@ pub fn (mut c TcpConn) write(bytes []byte) ?int {
 }
 
 // write_str blocks and attempts to write all data
+[deprecated: 'use TcpConn.write_string() instead']
 pub fn (mut c TcpConn) write_str(s string) ?int {
 	return c.write_ptr(s.str, s.len)
 }
 
+// write_string blocks and attempts to write all data
+pub fn (mut c TcpConn) write_string(s string) ?int {
+	return c.write_ptr(s.str, s.len)
+}
+
 pub fn (mut c TcpConn) read_ptr(buf_ptr byteptr, len int) ?int {
 	mut res := wrap_read_result(C.recv(c.sock.handle, buf_ptr, len, 0)) ?
 	$if trace_tcp ? {