Clarify a bit the $*ARGFILES in MAIN

v6d.pod

@@ -276,7 +276,7 @@ Zoffix
 
 It being based on @*ARGS is virtually never useful when you handle any sort of non-file arguments (which is what using MAIN implies).
 To allow lines(), get(), words(), and slurp() to Do The Right Thing when called and use $*IN, we should swap $*ARGFILES to $*IN
-(or to IO::ArgFiles.new($*IN), to maintain $*ARGFILES type consistency).
+(or to IO::ArgFiles.new($*IN), to maintain $*ARGFILES type consistency), when we're inside sub MAIN(){} and only maintain the current behaviour of considering @*ARGS when outside of MAIN.
 
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