Update sign-up.jsp

Patch for solve problem with recaptcha over https
NewReCaptcha method in sing-up.jsp changed to newSecureReCaptcha - whatever you use, 9090 or 9091 - captcha always will comes via HTTPS
(http://community.igniterealtime.org/message/238655)
lib "recaptcha4j" should be updated to the last version(0.0.8) - this solve problem with old ReCaptcha domain (SSL-cert error)
(community.igniterealtime.org/message/238656)
OF-767: Add jdk8 to the accepted jdk versions
Merge pull request #8 from SvenBunge/Java8

OF-767: Add jdk8 to the accepted jdk versions
Merge pull request #6 from Fx03nix/master

OF-780: lib "recaptcha4j" should be updated to the last version
Merge pull request #4 from Fx03nix/patch-1

OF-780: Update sign-up.jsp
Disable doclint in Javadoc of JDK8. If the build use JDK7 or below the additional parameter raises an error - so its only set for jdk8 builds
OF-744 Replace package.html with package-info.java
Merge branch 'master' of https://github.com/igniterealtime/Openfire
Merge pull request #9 from SvenBunge/Javadoc8

Disable doclint in Javadoc of JDK8.
Limit default encryption to XML properties only

See discussion here:
http://community.igniterealtime.org/message/238725#238725
OF-746 further improvements to debian init script and defaults file to
help locate JAVA_HOME
Merge branch 'official'