apache: parse whole response, not only the first 16 lines

apache: parse whole response, not only the first 16 lines

mod_status recently started reporting more statistics. According to
http://www.apache.org/dist/httpd/CHANGES_2.4 `mod_proxy, mod_ssl,
mod_cache_socache, mod_socache_*: Support machine readable server-status
produced when using the "?auto" query string.` for version 2.4.13
onwards.

As we can't assume everything we need will be included in the first 16
lines of output anymore, we now simply scan through the whole output.