Fix file reference with url parameters dropping ?=

[dherbst]

If you have in your html file something like

<script src="myfile.js?v=4.2.0">

hashres ends up chopping off the ?= from the replaced file

<script src="myfile.82828ef.js=4.2.0">

which is not a valid url. The problem seems to be in the capture after the url, which is not used in the replace.