[perl #29970] perlrun should mention sh -eu = perl -??

# New Ticket Created by  Dan Jacobson 
# Please include the string:  [perl #29970]
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# <URL: http://rt.perl.org:80/rt3/Ticket/Display.html?id=29970 >


Please say right there on the perlrun man page, the perl equivalents
to sh -u and sh -e, as these are such basic needs, so Bourne or
whoever, made them command line switches. Also say sh -x's equivalent too.
Hopefully the answers will look short like "sh -e" etc. themselves.

P.S. "all" is not "all" enough to give a non-zero $? in this case:
$ perl -mwarnings=all,FATAL -pe 'print $t' /dev/null;echo $?
Name "main::t" used only once: possible typo at -e line 1.
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• [perl #29970] perlrun should mention sh -eu = perl -?? by Dan Jacobson
• Re: [perl #29970] perlrun should mention sh -eu = perl -?? by Dave Mitchell