contrib: update opendht

Change-Id: I1dde09f8763af52a770c573504cbd1e4468e3469

contrib/src/opendht/SHA512SUMS

-61319e6b1d73710b16474c38713ab5bb800f342bab552244cf7727fb8da8deb1d0c150e51b3507475676a7e6c635ce8f388fe5e46b7f7c976ebe26780b85bfee  opendht-616d6fe4b8a12aeb40bae05ef68344ea623228fa.tar.gz
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+02a7ff9772ad81d28c5a8dd87fca319f9d2dcddbfc0f60894e1dcbb40f5a81f2d044d817b5032718d523a1dbb57ee3333e4c6d95d4e9ddc8d24fb179219e49bc  opendht-5b15fdeeefa58204c1e72bc5c9d147fce6352500.tar.gz
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contrib/src/opendht/package.json

 {
     "name": "opendht",
-    "version": "616d6fe4b8a12aeb40bae05ef68344ea623228fa",
+    "version": "5b15fdeeefa58204c1e72bc5c9d147fce6352500",
     "url": "https://github.com/savoirfairelinux/opendht/archive/__VERSION__.tar.gz",
     "deps": [
         "argon2",

contrib/src/opendht/rules.mak

 # OPENDHT
-OPENDHT_VERSION := 616d6fe4b8a12aeb40bae05ef68344ea623228fa
+OPENDHT_VERSION := 5b15fdeeefa58204c1e72bc5c9d147fce6352500
 OPENDHT_URL := https://github.com/savoirfairelinux/opendht/archive/$(OPENDHT_VERSION).tar.gz
 
 PKGS += opendht