getdata: add cidr range support

This makes 'range6 123::/45' style cidr notation to be understood as address
range.  Earlier ranges that used cidr failed to parse completely.

Reported-by: Jeff Bailey <jeffrey.bailey@bt.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

tests/Makemodule.am

@@ -20,6 +20,8 @@ TESTS = \
 	tests/leading0 \
 	tests/one-ip \
 	tests/one-line \
+	tests/range4 \
+	tests/range6 \
 	tests/same-twice \
 	tests/simple \
 	tests/sorts \

tests/confs/range4

@@ -0,0 +1,31 @@
+shared-network example1 {
+	subnet 10.0.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.0.0.0/27;
+		}
+	}
+	subnet 10.1.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.1.0.1/27;
+		}
+	}
+}
+
+shared-network example2 {
+	subnet 10.2.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.2.0.1/28;
+		}
+	}
+	subnet 10.3.0.0  netmask 255.255.255.0 {
+		pool {
+			range 10.3.0.1/29;
+		}
+	}
+}
+
+subnet 10.4.0.0  netmask 255.255.255.0 {
+	pool {
+		range 10.4.0.1/32;
+	}
+}

tests/confs/range6

@@ -0,0 +1,4 @@
+subnet6 dead:abba:1000::/56 {
+        range6 dead:abba:1000::/56;
+        prefix6 dead:abba:1000:0100:: dead:abba:1000:ff00::/56;
+}

tests/expected/range4

@@ -0,0 +1,16 @@
+Ranges:
+shared net name     first ip           last ip            max   cur    percent  touch   t+c  t+c perc
+example1            10.0.0.0         - 10.0.0.31           32    12     37.500      0    12    37.500
+example1            10.1.0.1         - 10.1.0.31           31    10     32.258      0    10    32.258
+example2            10.2.0.1         - 10.2.0.15           15     8     53.333      0     8    53.333
+example2            10.3.0.1         - 10.3.0.7             7     7    100.000      0     7   100.000
+All networks        10.4.0.1         - 10.4.0.1             1     1    100.000      0     1   100.000
+
+Shared networks:
+name                   max   cur     percent  touch    t+c  t+c perc
+example1                63    22     34.921       0     22    34.921
+example2                22    15     68.182       0     15    68.182
+
+Sum of all ranges:
+name                   max   cur     percent  touch    t+c  t+c perc
+All networks            86    38     44.186       0     38    44.186

tests/expected/range6

@@ -0,0 +1,10 @@
+Ranges:
+shared net name     first ip                                  last ip                                   max   cur    percent  touch   t+c  t+c perc
+All networks        dead:abba:1000::                        - dead:abba:1000:ff:ffff:ffff:ffff:ffff   4.72237e+21     2      0.000      1     3     0.000
+
+Shared networks:
+name                   max   cur     percent  touch    t+c  t+c perc
+
+Sum of all ranges:
+name                   max   cur     percent  touch    t+c  t+c perc
+All networks         4.72237e+21     2      0.000       1      3     0.000

tests/leases/range4

@@ -0,0 +1 @@
+complete

tests/leases/range6

@@ -0,0 +1 @@
+v6

tests/range4

@@ -0,0 +1 @@
+test.sh

tests/range6

@@ -0,0 +1 @@
+test.sh