Improve the default paging render URLs

Currently, the paging urls are something like:

<hst:renderURL var="pagelink">
<hst:param name="page" value="${symbol_dollar}

"/>
<hst:param name="query" value="${symbol_dollar}

"/>
</hst:renderURL>

However, since the 'query' is originally a public request parameter, it is repeated already! Hence, it can be ignored in the paging block