Change `-vanilla` to `-nonorthstardll` in vanilla section

[itscynxx]

260 added a mention of -vanilla as it was written before the functions of the launch argument were changed in Northstar, and was merged after #259 was, leaving a new, outdated mention of -vanilla

[GeckoEidechse]

I thought -vanilla encompasses -nonorthstardll?

[itscynxx]

I thought -vanilla encompasses -nonorthstardll?

the old -vanilla ignored loading the Northstar dll

the new -vanilla does what -norestrictservercommands does, as well as some more like allowing fairfight and not trying to auth with atlas

the new -nonorthstardll ignores loading the Northstar dll

the new -vanilla still uses northstar.dll, as you can load mods with it, etc as the pr for the updated -vanilla says, "Old -vanilla behaviour is now handled by -nonorthstardll"

[GeckoEidechse]

Ah right, got the two mixed up again, lol