PHPDoc standardized syntax for variadic function parameters in https://github.com/phpDocumentor/phpDocumentor/issues/629. Thus follow that syntax.

• Check that Phorge docs still render as before: grep for ... within src/applications/diviner, see that the only result writes and does not read
• Run ./bin/diviner generate --clean, see that "Loading Objects" section on http://phorge.localhost/book/dev/class/LiskDAO/ looks the same before and after
• Run static code analysis, get no more parse errors which mention ...