Merge pull request rbsec#12 from asadath1395/fix_import_spelling

Fix Spelling mistake leads to program not being compiled

dnscan.py

@@ -20,7 +20,7 @@
 try:    # Python2 and Python3 have different IP address libraries
         from ipaddress import ip_address as ipaddr
 except ImportError:
-        from  netaddr import IPaddress as ipaddr
+        from  netaddr import IPAddress as ipaddr
 
 try:
     import argparse