Sybil: Enable analysis and blocking by default

...routerconsole/java/src/net/i2p/router/sybil/Analysis.java

...erconsole/java/src/net/i2p/router/sybil/PersistSybil.java

...sole/java/src/net/i2p/router/web/RouterConsoleRunner.java

...le/java/src/net/i2p/router/web/helpers/SybilRenderer.java