Full path to reference doc does not work in Cygwin

[Hans Kunkell <hanzukun-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Hi!

This is my first message, so I would like to thank all contributors
for this great software!

I have an issue with full path names to --reference-doc and --data-dir.

I run pandoc from within a bash script running in Cygwin under Windows
7. If I use full path information to the --reference-doc or
--data-dir, I get the error
openBinaryFile: does not exist (No such file or directory)

For example, these 2 examples does not work:
pandoc --reference-doc=/home/hans/Documents/script/reference.odt -o
test.odt input.md
pandoc --reference-doc=/cygdrive/c/Users/Hans/Documents/script/reference.odt
-o test.odt input.md

For the case of --data-dir I will not get an error but it is obvious
that my reference.odt has not been applied to the output file.


These works in Cygwin environment:
pandoc --reference-doc=../script/reference.odt -o test.odt input.md
                              # relative path
pandoc --reference-doc='C:\Users\Hans\Documents\script\reference.odt'
-o test.odt input.md           # windows style full path
pandoc --data-dir='C:\Users\Hans\Documents\script\' -o test.odt
input.md                             # windows style full path

I have tested both Pandoc 2.7.2 and 2.7.3 with same result.
Cygwin version: CYGWIN_NT-6.1 dator 3.0.1(0.338/5/3) 2019-02-20 10:19
x86_64 Cygwin

Full paths works in CMD.exe and in Linux (Ubuntu with pandoc 2.7.2).
For me it is of a smaller issue, but
pandoc -s --reference-doc=~/Documents/script/reference.odt -o test.odt
input.md                      # Does not work with ~ (tilde)
will also not work.

Has anyone else experienced these issues?
I can workaround this but I think it would be good if it worked.

Regards
Hans