Hi folks,

Thanks to a contribution from Dylan Cali, the startup shell scripts
have been tweaked to be shellcheck[1] compliant. We have done a
bit of manual testing but if anyone (especially any cygwin/msys users)
wants to do more extensive checks that everything is behaving as
expected, that would be great.

No changes were done to windows .bat files.

I plan to incorporate that change into 2.5.7 in a few days time
if I don't get any further feedback.

Cheers, Paul.

[1] https://github.com/koalaman/shellcheck