#19 Ipv6 addresses in client_whitelist are ignored

[Patrick Vande Walle]

IPv6 addresses in client_ip_whitelist and client_ip_whitelist.local are ignored.

The following patch is against 1.7.6 and does two things:

1. It changes the regexp to identify IPv6 addresses. Letters in addresses are case-insensitive per the IPv6 specs.
2. It correctly reads the IPv6 addresses in client_ip_whitelist and client_ip_whitelist.local

[Patrick Vande Walle]

sqlgrey-1.7.6-IPv6.patch