got stuck with web.page.regexp

[Holser]

I tried to include to my configuration some checks which were added in beta12 and found that web.page.regexp is not documented at all. I checked the source src/libs/zbxsysinfo/common/http.c but it doesn't look clear. So I want to ask how to use this feature? What keys do I need to insert. The goal is to monitor one particular site and look for "DB issue" in output. It'd be great if regexp is supported andi can use !^(DB issue|MySQL)$

So I would like this explained in Wik,i and, in documentation if it's possible.

Thank you in advance.