Using shared IP::CheckNetwork instead of buggy one in SuSEFirewallExpertRules
Adjusted to SP3
Replacing IPv4 only with both IPv4 and IPv6 support
Removed unneeded import
Using ValidNetwork from IP module

Conflicts:
	package/yast2-firewall.changes
Explicitly mentioning IPv6 in "why"

Conflicts:
	package/yast2-firewall.changes
Shortening lines
Shortening lines