update libsodium url and core to v0.16.3 in docker

test/Dockerfiles/build_docker.sh

@@ -15,13 +15,13 @@ build_docker ()
         return 0
     fi
 
-    core_version='0.16.1'
+    core_version='0.16.3'
     core_dist="bitcoin-${core_version}-x86_64-linux-gnu.tar.gz"
-    core_url="https://bitcoin.org/bin/bitcoin-core-${core_version}/${core_dist}"
+    core_url="https://bitcoincore.org/bin/bitcoin-core-${core_version}/${core_dist}"
     libffi_lib_tar='v3.2.1.tar.gz'
     libffi_url="https://github.com/libffi/libffi/archive/${libffi_lib_tar}"
     sodium_lib_tar='libsodium-1.0.13.tar.gz'
-    sodium_url="https://download.libsodium.org/libsodium/releases/${sodium_lib_tar}"
+    sodium_url="https://download.libsodium.org/libsodium/releases/old/${sodium_lib_tar}"
     declare -A deps=( [${core_dist}]="${core_url}" [${libffi_lib_tar}]="${libffi_url}" [${sodium_lib_tar}]="${sodium_url}" )
     jm_root="${TRAVIS_BUILD_DIR}"
     owner_name="${TRAVIS_REPO_SLUG%\/*}"