First version of the status engine implementation

The Status Engine allow the measurements of how many ModSecurity
instances are running around the world, as long as information
on how many times it had been restarted and so on. Everytime that
the server is started it perform a DNS query that is redirected
to our servers, that query constains information about the
ModSecurity version and it dependencies versions. It also sends a
unique indetification generate locally for the server, avoiding
counting the same server twice while generating the statistics.
This id is a sha-1 hash of the machine name + mac address of the
first network adapter. In this commit it is enabled by default,
in the release will be a configuration option to disable this
functionality. It also important to cite that the information
gather by this query will be also available in ModSecurity website
public open via a JSON stateless API. There will be an fancy
heatmap as well.
Adds SecStatusEngine On/Off switch

Add the possibility to turn the Status Engine On or Off using the
directive SecStatusEngine [On/Off]. By default it is On.
Adds support to status engine on IIS version

Fixes on the windows versions: build, mac address and machine name retrieval
Places StatusEngine to be Off by default

StatusEngine is now marked as Off by default. This patch also adds the
SecStatusEngine directive to our recommend configuration file.
Adds regression test to SecStatusEngine

Just checking the error log while have SecStatusEngine set to On in a first
test and Off in a second.
Adds modsecStatusEngineCall to standalone API

In ModSecurityIIS the configuration is loaded upon the first request
is received. In other words, SecStatusEngine value can be only
loaded once the first request hit the server, and so, the status
function was moved to proceed just after the configuration got loaded.
This update is IIS only.
Merge branch 'modsec_status' into iis_installer
iis: Changes ModSecurityIIS conf to set SecEngineStatus to On