iftop: bump to latest

The sender domain has a DMARC Reject/Quarantine policy which disallows
sending mailing list messages using the original "From" header.

To mitigate this problem, the original message has been wrapped
automatically by the mailing list software.
Choose first running interface, rather than first "up" interface (Redhat #1403025)

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

package/network/utils/iftop/Makefile

@@ -12,9 +12,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://code.blinkace.com/pdw/iftop.git
-PKG_SOURCE_DATE:=2017-02-06
-PKG_SOURCE_VERSION:=35af3cf65f17961d173b31fd3b00166ec095c226
-PKG_MIRROR_HASH:=84131e2448ea5aa884d2bd7d58dc81741b5c476b4664a8c2c1eb34f62985804a
+PKG_SOURCE_DATE:=2017-03-22
+PKG_SOURCE_VERSION:=949ed0f7e2c54c598868c270b82c2d702131a339
+PKG_MIRROR_HASH:=2ba96d9a2adf4e43aaab439a9ccab8f21b415da48d1c8939f6dcea8e6e11524f
 PKG_MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
 PKG_LICENSE:=GPL-2.0