merge revision(s) 33200,33662,33666,33770,33937,33944,33946,33981,34043,
                  34045,34132:

	* io.c (rb_sys_fail_path): move the definition.
	  Move above for using it in set_binary_mode_with_seek_cur().

	* io.c (set_binary_mode_with_seek_cur): fix improper seek cursor.
	  Seeking file cursor with setting binary mode has possibility to
	  cause infinite loop. Fixed the bug and refined error handling.,
	  Introduced at r34043.

	  And cleanups as below.
	  Remove unnecessary parentheses of `fptr`.
	  Use return value of setmode().

	* test/ruby/test_io_m17n.rb
	  (TestIO_M17N#test_seek_with_setting_binmode): add a test for above.
	  [ruby-core:41671] [Bug #5714]

	* test/ruby/test_io_m17n.rb
	  (TestIO_M17N#test_{read_with_binmode_and_get[cs]}): only for Windows.

	* win32/win32.c, include/ruby/win32.h (rb_w32_fd_is_text): new function.

	* win32/win32.c (init_stdhandle): set default mode of stdin as binmode.

	* io.c (set_binary_mode_with_seek_cur): new function to replace
	  SET_BINARY_MODE_WITH_SEEK_CUR macro.  now returns previous mode of the
	  fd and take care of LF in rbuf.

	* io.c (do_writeconv): set text mode when needed.

	* io.c (io_read): need to change the mode of the IO to binmode
	  temporally when the length for IO#read, because IO#read with length
	  must behave so.

	* test/ruby/test_io_m17n.rb (TestIO_M17N#test_{read_with_length,
	  read_with_length_binmode,get[cs]_and_read_with_binmode,
	  read_with_binmode_and_get[cs],read_write_with_binmode}): tests for
	  above changes.

	  all patches are written by Hiroshi Shirosaki. [ruby-core:41496]
	  [Feature #5714]

	* test/rexml/test_order.rb (OrderTester#test_more_ordering): use
	  GZip::GzReader.open instead of GZip::GzReader.new with File.new.
	  fixed a test error on Windows introduced at r33946.

	* ext/zlib/zlib.c (rb_gzreader_initialize): revert a part of r33937.
	  1st, to change the mode of an IO is very sensitive problem, so
	  the maintainer of this library should judge it.
	  2nd, usually Zlib::GzReader.new is not called directly.  #initialize
	  is called via .open, and in the method the I/O is opened in binary
	  mode, so there is no problem without changing the mode in #initialize.

	* ext/zlib/zlib.c (rb_gzreader_initialize): use binary mode by default
	  under Windows. Patch by Hiroshi Shirosaki. [ruby-core:40706]
	  [Feature #5562]

	* include/ruby/encoding.h (void rb_econv_binmode): define NEWLINE
	  decorator.

	* io.c (rb_cloexec_fcntl_dupfd): Introduce NEED_READCONV and
	  NEED_WRITECONV to replace universal newline decorator by CRLF only
	  when required to improve file reading and writing under Windows.
	  Patch by Hiroshi Shirosaki. [ruby-core:40706] [Feature #5562]
	* io.c (do_writeconv): adjust binary mode if required.
	* io.c (read_all, appendline, swallow, rb_io_getline_1): ditto.
	* io.c (io_getc, rb_io_each_codepoint, rb_io_ungetc): ditto.
	* io.c (rb_io_binmode, rb_io_ascii8bit_binmode): ditto.
	* io.c (rb_io_extract_modeenc, rb_sysopen): ditto.
	* io.c (pipe_open, prep_stdio, io_encoding_set): ditto.
	* io.c (rb_io_s_pipe, copy_stream_body): ditto.

	* test/ruby/test_io_m17n.rb (EOT): add test for pipe and stdin in
	  binary mode.

	* win32/win32.c (init_stdhandle): remove O_BINARY from stdhandle
	  initialization.
	* win32/win32.c (rb_w32_write): use FTEXT mode accordingly.

	* io.c (argf_next_argv): wrong timing of setting ecflags.
	  fixed the failure of TestArgf#test_textmode introduced at r33662.

	* include/ruby/encoding.h (ECONV_NEWLINE_DECORATOR_READ_MASK,
	  ECONV_NEWLINE_DECORATOR_WRITE_MASK): new macro.

	* io.c (rb_io_extract_modeenc, pipe_open, prep_stdio, argf_next_argv):
	  set TEXTMODE_NEWLINE_DECORATOR_ON_WRITE for textmode on creating IO
	  if the flag is available.

	* io.c (make_writeconv): drop decorators for reading.

	* io.c (make_readconv): drop decorators for writing.

	* io.c (do_writeconv): existing writeconv is not the condition to raise
	  ArgumentError.  should check textmode or not.

	* test/ruby/test_io_m17n.rb
	  (TestIO_M17N#test_{cr,lf,crlf}_decorator_on_stdout): test above
	  changes.

	* transcode.c: enabled econv newline option.