Explicitly enable access to web cron script

See issue http://forum.piwik.org/read.php?2,109382

Explicitly enable access to web cron script
3388e3b5 · Piotr · d2bda6f6 · 3388e3b5
--- a/misc/cron/.htaccess
+++ b/misc/cron/.htaccess
+# Allow direct web access to selected files
+<FilesMatch "^(archive\.php|updatetoken\.php)$">
+	Order Allow,Deny
+	Allow from all
+</Files>