If the user performing a WHOIS has hidden their idle time (is umode +I),
also prevent them from seeing other user's idle times, even if said users
are not themselves umode +I.
Suggested-by: @Unit193
What is done here:
1. All the outdated configuration flag information has been removed and
replaced with the more current information.
2. Spellchecking has been done on all helpfiles and the actual errors
have been fixed.