Merge pull request #3635

12edce5 Update the address for downloading libpng (Micha)

doc/release-process.md

@@ -43,7 +43,7 @@ Release Process
 	wget 'https://www.openssl.org/source/openssl-1.0.1e.tar.gz'
 	wget 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz'
 	wget 'http://zlib.net/zlib-1.2.8.tar.gz'
-	wget 'ftp://ftp.simplesystems.org/pub/png/src/libpng16/libpng-1.6.8.tar.gz'
+	wget 'ftp://ftp.simplesystems.org/pub/png/src/history/libpng16/libpng-1.6.8.tar.gz'
 	wget 'https://fukuchi.org/works/qrencode/qrencode-3.4.3.tar.bz2'
 	wget 'https://downloads.sourceforge.net/project/boost/boost/1.55.0/boost_1_55_0.tar.bz2'
 	wget 'https://svn.boost.org/trac/boost/raw-attachment/ticket/7262/boost-mingw.patch' -O \