comm_dssetup.pl: New Option for a Password File Enhances Security in Calendar Server 6.3

To enhance security, it is now possible to specify a password file rather than a text password when running comm_dssetup.pl. With the new -j <passwordfilename > option, you can protect passwords and enhance security. This is especially useful for scripts. If you have scripts that currently expose the password, and wish to change them, delete the -w < password> option and replace it with this new one.

This is a fix for problem #6392093.