[syslog-ng]Where did netmask() come from ?

[Wayne Sweatt]

I did not have a clue about this function. This should do just what I want
in getting the logs from clients on various networks logged into different
log directories.
Thanks to Mr Verde!
So when did this added netmask() function appear? Is the documentation old?
What version of syslog-ng/libol was this introduced in?
Does the on-line documentation need updating?

Thanks,

 Wayne Sweatt
 Sr. UNIX System Administrator
 Comforce Technical Services
 LANL SCC Team