Forum search doesn't escape characters properly

Hi there,

The search functionality of this forum doesn’t escape characters properly. For example, searching for:

/etc/crontabs
will cause a 404:
Not Found The requested URL /forums/search/etc/crontabs/ was not found on this server.

Apache/2.4.18 (Ubuntu) Server at www.gl-inet.com Port 443

right. This is a problem. Need to fix it.