ver 3.3.8 * Support rectangle selection by pressing alt key while selecting. * Support DECDMAC/DECINVM. * Start scp by drag&drop a file with shift key to the screen on ssh connection. * Add --seqfmt/vt_seq_format option. * Read /dev/kbd on NetBSD/x68k framebuffer. * Add "Auto detect" entry to "Encoding" tab of mlconfig. * Add "Local echo" checkbox to "Others" tab in mlconfig. * Bug fixes: Fix weird background picture on NetBSD/x68k Text VRAM by unexpectedly cached pixels.