curl-update-AsynchDNS

check Curl Version : # curl -V
get latest, or your actual curl Version (http://curl.haxx.se/download.html)
in this example curl 7.40
(be warned, some Software rely very strong on given Versions of Curl by packet manager, so this is a very good Moment for a System Bacckup !)

wget http://curl.haxx.se/download/curl-7.40.0.tar.gz
tar xzf curl-7.40.0.tar.gz
cd curl-7.40.0
./configure --enable-threaded-resolver --with-libmetalink --with-gssapi --enable-sspi --with-nghttp2
./make
./make install