Update requestlog.pm

* Fixed the regular expression to handle lines like these:
07/Aug/2014:00:00:50 -0500 [68097] -> GET /index.html HTTP/1.1
07/Aug/2014:00:00:50 -0500 [68097] <- 404 text/html 37ms

* fixed missing timestamp variable on line 86 as it was missing and this was breaking the script