Enable yacy install on debian with openjdk-8 only

Also added curl or wget in Suggests as they are required to run sh
scripts in /bin.

debian/control

@@ -7,7 +7,8 @@ Standards-Version: 3.7.2
 
 Package: yacy
 Architecture: all
-Depends: openjdk-7-jre-headless, sudo, debconf
+Depends: openjdk-7-jre-headless | openjdk-8-jre-headless, sudo, debconf
+Suggests: curl | wget
 Description: Peer-to-Peer Web Search Engine
  YaCy is a Java-based peer-to-peer search engine.
  It provides a personal web search engine, which is