Fix errors when .bat file path contains paranthesis.

[szdmr]

Without double quotes the path with paranthesis gets evaluated causing an error on Windows systems. Specifically the error text is ".. was unexpected at this time."

I got the error when I moved my Play distro inside a Dropbox folder with name "Dropbox (COMPANYNAME)". The path (COMPANYNAME) part gets evaluated as the if condition clause and makes the batch throw the error above and close.

Double quoting the %CFG_FILE% variable seems to be fixing the error.

[lightbend-cla-validator]

Hi @szdmr,

Thank you for your contribution! We really value the time you've taken to put this together.

Before we proceed with reviewing this pull request, please sign the Typesafe Contributors License Agreement:

http://www.lightbend.com/contribute/cla

[szdmr]

FYI I signed the Typesafe Contributors License Agreement.

[muuki88]

Thanks for your PR. I'm not too familiar with the windows stuff, so
@nazoking @bjuric do you have any objections?

[muuki88]

@szdmr on which systems did you test the change? I really would like to merge this change, but we had some rough experiences with the windows bat script :(

[szdmr]

@muuki88 tried it on Windows 8.1 and Windows 10 only, both 64 bits. I don't know if it breaks anything for Windows 8 or below, but do not expect it to do.

It would fail if %CFG_FILE% contained a double quote, but that's impossible as Windows does not let a file or folder to contain double quote in names.

[muuki88]

thanks for the clarification 👍