chgserver: add fastannotate config section to sensitive list
Depending on the config value of `fastannotate.modes`, the fastannotate
extension can do different things in uisetup. Depending on value of
`fastannotate.server`, it can register new wireprotocol capabilities.
This fixes test-fastannotate-hg.t, test-fastannotate-protocol.t and
test-fastannotate.t with chg.
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}