Since you never use $nossl within your routine, this is equivalent to 
my $newsite = shift;

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There is no significance in using the same name inside and outside the routine. This just says that you want to set $newsite using the first parameter passed to the subroutine.

In reply to Re^3: Passing a variable to a sub process. by Bilbo
in thread Passing a variable to a sub process. by misconfiguration

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