injector: add -s/--supress option

With this option messages about already existed hostnames will be
supressed.

injector

@@ -22,6 +22,8 @@ parser.add_argument('-f', '--file', default=os.environ['HOME'] + '/.i2p/hosts.tx
 		help='hosts.txt for parsing')
 parser.add_argument('-d', '--description', default='Auto-added from external hosts.txt',
 		help='provide custom description message')
+parser.add_argument('-s', '--supress', action='store_true',
+		help='supress warnings about already existed hostnames')
 args = parser.parse_args()
 
 f = open(args.hostsfile, 'r')
@@ -45,6 +47,7 @@ for line in f:
 		# beacuse they will fail anyway.
 		qs = i2phost.objects.filter(name=hostname)
 		if qs.exists():
+			if not args.supress:
 				print 'Host %s already exists' % hostname
 		else:
 			print 'Adding %s' % hostname