Use lower-privileged service account on Windows

[adamretter]

The previous version of Commons Daemon (1.1.0) ProcRun would run the Windows service under the Windows LocalSystem user account which is highly-privileged.

The new version (1.2.0) by default installs the service using the lesser privileged Windows NT Authority\LocalService user account.

Unfortunately the eXist-db service won't seem to start under that lower privileged account, I am not sure why yet…

We should investigate this, and get eXist-db Windows Service starting and running under the more secure NT Authority\LocalService user account.

[duncdrum]

the default account should be mentioned in the docs, imv.

[duncdrum]

@adamretter can we get a mention of the user accounts on different win systems for the docs please, thx.