Feature/improve parse ip range

[klaxon1]

To resolve #270.

Operation 'Parse IP range' can accept as input a list of IP and CIDR addresses (1 per line) and returns the smallest subnet that covers them all.

As described in the issue - the function finds the smallest and largest IPs and constructs a range between them.

IPv4 Example
Input:

2.2.2.2
3.3.3.3/24
1.1.1.1

Output:

Minimum subnet required to hold this range:
	Network: 0.0.0.0
	CIDR: 6
	Mask: 252.0.0.0
	Subnet range: 0.0.0.0 - 3.255.255.255
	Total addresses in subnet: 67108864

Range: 1.1.1.1 - 3.3.3.255
Total addresses in range: 33686271

The specified range contains more than 65,536 addresses. Running this query could crash your browser. If you want to run it, select the "Allow large queries" option. You are advised to turn off "Auto Bake" whilst editing large ranges.

IPv6 Example
Input:

2404:6800:4001:ffff:ffff:ffff:ffff:ffff
2404:6800:4001::ffff
2404:6800:4001:ffff:ffff::1111
2404:6800:4001::/64

Output:

Range: 2404:6800:4001:0000:0000:0000:0000:0000 - 2404:6800:4001:ffff:ffff:ffff:ffff:ffff
Shorthand range: 2404:6800:4001:: - 2404:6800:4001:ffff:ffff:ffff:ffff:ffff
Total addresses in range: 1.2089258196146292e+24

[n1474335]

Great, thanks very much! This is very useful.