ModSecurity IIS startup message is flooding the event log

[zimmerle]

It seems like ModSecurity for IIS is logging its startup messages way too much, flooding the logs with messages similar to the one bellow:

[...] ModSecurity for Apache/2.8.0 (http://www.modsecurity.org/) configured.
[...] ModSecurity: APR compiled version="1.4.8"; loaded version="1.4.8"
[...] ModSecurity: PCRE compiled version="8.31 "; loaded version="8.31 2012-07-06"
[...] ModSecurity: LUA compiled version="Lua 5.1"
[...] ModSecurity: LIBXML compiled version="2.9.1

IIS threads sleeps from time to time, waking up once a request is received. Once started, the thread loads ModSecurity and consequently print these message on the event logs once more, flooding the event logs.

Those events should be treated in a clever way, not changing the default behavior of ModSecurity (which is platform independent) but also not flooding the event log.

[zimmerle]

Similar to: #675

[naziml]

I would also consider adding a single event when ModSecurity for IIS is actually enabled in config. I would log the config file (with full path) used for ModSecurity in this event.