[BUGFIX] Fix IP address validation
The IP address validation done with filter_var() worked
on the development machine running PHP 5.3.12, however,
it failed on the integration server running PHP 5.3.5.
Apparently, the filter_var options for FILTER_VALIDATE_IP
behave differently in these versions.
This patch removes the validation for IPv4 / IPv6 addresses
because they didn't make sense anyway.
In that regard: hooray for PHP behavior changes. They actually
exploit bad application code. Sometimes.
Releases: 1.1, 1.2