add ip merge script

utils/merge.py

@@ -0,0 +1,23 @@
+import argparse
+
+import netaddr
+
+
+def read(fh):
+    for line in fh:
+        yield line.rstrip()
+
+    fh.close()
+
+
+def merge(fh):
+    for addr in netaddr.cidr_merge(read(fh)):
+        print(addr)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Merge IP addresses into the smallest possible list of CIDRs.')
+    parser.add_argument('--source', nargs='?', type=argparse.FileType('r'), required=True, help='Source file path')
+    args = parser.parse_args()
+
+    merge(args.source)

utils/requirements.txt

@@ -0,0 +1 @@
+netaddr==0.8.0