contrib: bump dhtnet

This fixes a bug in DHTNet that caused some of the daemon tests on
Jenkins to generate a large volume of logs (20+ GB) before eventually
timing out.

GitLab: #1059
Change-Id: I6d824d457c5bed929ba654b45c787c395b326ca5

contrib/src/dhtnet/package.json

 {
     "name": "dhtnet",
-    "version": "9e064bf993e8fa87609ce756f035a59d925efb70",
+    "version": "872e82fb62ab3119f3b6f715e21c0edbeb427891",
     "url": "https://review.jami.net/plugins/gitiles/dhtnet/+archive/__VERSION__.tar.gz",
     "deps": [
         "opendht",

contrib/src/dhtnet/rules.mak

 # DHTNET
-DHTNET_VERSION := 9e064bf993e8fa87609ce756f035a59d925efb70
+DHTNET_VERSION := 872e82fb62ab3119f3b6f715e21c0edbeb427891
 DHTNET_URL := https://review.jami.net/plugins/gitiles/dhtnet/+archive/$(DHTNET_VERSION).tar.gz
 
 PKGS += dhtnet