scripts/download.pl: add support for adding mirrors through an environment variable

Signed-off-by: Felix Fietkau <[email protected]>

SVN-Revision: 43654

scripts/download.pl

@@ -40,6 +40,9 @@ sub localmirrors {
 		close CONFIG;
 	};
 
+	my $mirror = $ENV{'DOWNLOAD_MIRROR'};
+	$mirror and push @mlist, split(/;/, $mirror);
+
 	return @mlist;
 }