It's the old LINK TRICK!

ln -s /home/brianp/bin/psr.pl /home/brianp/bin/psh/psr

brianp@raptor:~$ perl -v | psr "s/^\s*$//" | head -n 2
This is perl 5, version 22, subversion 1 (v5.22.1) built for x86_64-li
+nux
Copyright 1987-2015, Larry Wall

PATHEXT=.BAT;.pl;.EXE;.COM;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;
+.PYW
[download]

It's Alive!

Forcing each user to either vitiate their script names or maintain
a parallel link system with double maintenance is most inattentive!

Fixing such a simple problem by destroying information and abolishing
file extensions just seems wrong-headed. Perhaps, it's the NIH syncrom;

How about (ba)sh feature: EXEC_EXTENSION=pl:sh:py:rb ExExt?

Having the ability to specify execution preference based not only
on directory but also on EXTension is very handy.

Rather like Intermittent Windshield Wipers!
Once you have used them, they are hard to do without.

Ford never put them on the Model T so YOU CAN'T HAVE THEM!
How can you have your wipers both ON and OFF at the Same Time?
That's Just Crazy!!!
Have you tried REMOVING YOUR WINDSHIELD TO FIX THE PROBLEM?? :-)

This is NOT a PERL PROBLEM. I was hoping that there was a
GOOD PERL SOLUTION
eval(($COMSPEC($cmd)) =~ m/BAD COMMAND/i) && exec(&fcmd($cmd))[0]) *!!!

NOTE* Concept only, do not run, may fuse your North Bridge!