8021788: JarInputStream doesn't provide certificates for some file under META-INF
Reviewed-by: chegar, sherman
8022761: regression: SecurityException is NOT thrown while trying to pack a wrongly signed Indexed Jar file
Reviewed-by: sherman
Import 'demos.patch'

Do not build demo

From: IcedTea 2.4.1 (http://icedtea.classpath.org/download/source/icedtea-2.4.1.tar.gz)
Merge remote-tracking branch 'upstream/jdk7u-dev'