merge-pod changes for cygwin and MSWin32 perl

merge-pod changes for cygwin and MSWin32 perl

On Windows, the git repository is checked out as CR-LF.
Tell perl to open the pod file with cr-lf as the end of line.

On Windows, the input file names are of the form podX\foo.pod.in.
Cygwin perl cannot parse the directory for the file name unless
the path separator is converted from \ to /.

Change-Id: I7139bd2138573e938ea3e8386685f3b69e131c4d
Reviewed-on: http://gerrit.openafs.org/5113
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>