Fix API documentation broken links in the doc-site

[ericnordelo]

There are a few places where the autogenerated link is either broken or miss-formatted:

I noticed three main cases:

1. The scoped module is missing (ex: {renounceRole} instead of {AccessControl-renounceRole}).
2. Extra pair of brackets (ex: {{renounceRole}} instead of {renounceRole})
3. References to private functions that are not automatically documented, becoming broken references in the doc-site (ex: {_getAdminRestrictions} in AccessManager).

The first two should be directly fixed, or a rule can be created to check them (asciidoctor detects the broken references for ex).

For the latter, I think a design to avoid private function references in the doc-site would be helpful (something as simple as using privateFunctionName instead of {privateFunctionName} could help.

EDIT: Here is a link to some broken references in the doc-site (third paragraph).