This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Document FATAL warnings as discouraged.
Discussions on p5p have reached reasonable consensus that fatal warnings are
a misfeature.
This commit marks fatal warning as "discouraged" and moves up the
related cautionary documentation to highlight the risks of using them.
For details on the many historical and current issues with fatal warning, see
http://www.nntp.perl.org/group/perl.perl5.porters/2015/01/msg225235.html