User preference to accept any SSL certificate (closes #165)

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Merge branch 'master' into sslblackhole
Classpath: export client-common-java

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Blackhole SSL context: include KeyManagers (really closes #165)

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>