No, almost no JA+ cvars work in JA++, but there may be equivalent cvars.
I recommend reading through this page, though it's not the absolute most up-to-date.
For the most up-to-date but lacking descriptions, check out the source: game, client, ui
+ the configs on the main site.
If you wish to set up admin accounts, there's a bit of an explanation here
The ideology behind JA++ cvars is that the default values are safe, and no gameplay changes are forced upon you. Everything is optional.
There is no real "standard" configuration, because the default values are a standard configuration of a server.
If you have more specific questions of how you want your server to behave, ask away and I'll try to provide a solution.