Log Message:
Changes 1.5:
When encoding with FORCE_BINARY_IO mode in effect, the explicit "\r\n"
end of line sequence caused double carriage returns in the output,
because the output text file is subject to expansion of LF to CR/LF
line terminators.  I made the "eol" sequence conditional on
FORCE_BINARY, so that just a line feed is written to streams
which will expand it.