[Bug web/87684] -Woverloaded-virtual is not documented

[bugzi...@poradnik-webmastera.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87684

--- Comment #1 from Daniel Fruzynski <bugzi...@poradnik-webmastera.com> ---
Last paragraph should be "clang includes -Woverloaded-virtual in -Wall", I
noticed this too late to correct it.