Some researchers have come with great idea of recommending
setting "LimitRequestline 512" in Apache, what allows even shorter URLs
than with MSIE.
I still consider this a really bad idea as most of the applications
really do not count with so small URL limits, but this error seems to be
quite widely spread among CentOS users (probably coming from some
howto).
Fixes#12244
Signed-off-by: Michal Čihař <michal@cihar.com>