javadoc cleanup after review

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

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

...terconsole/java/src/net/i2p/router/web/WebAppStarter.java

core/java/src/net/i2p/crypto/TrustedUpdate.java

core/java/src/net/i2p/time/Timestamper.java

history.txt

router/java/src/net/i2p/data/i2np/TunnelBuildMessage.java

...r/java/src/net/i2p/data/i2np/TunnelBuildReplyMessage.java

router/java/src/net/i2p/router/startup/ClientAppConfig.java

...er/java/src/net/i2p/router/tunnel/pool/BuildExecutor.java

...r/java/src/net/i2p/router/tunnel/pool/BuildRequestor.java