OF-780: Update sign-up.jsp

OF-780: lib "recaptcha4j" should be updated to the last version

OF-767: Add jdk8 to the accepted jdk versions

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)

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)

where to find the bundled JRE when building the installer.rpm target.  For example
ant -Djre.bundle.location=/tmp/jre-1.7.0-55.tgz installer.rpm

where to find the bundled JRE when building the installer.rpm target.  For example
ant -Djre.bundle.location=/tmp/jre-1.7.0-55.tgz installer.rpm

http://community.igniterealtime.org/message/238552#238552

Allow plugins to register/unregister servlets programmatically. Applies
patch contributed by Andrea Ratto.

Handle each affiliation change item in the IQ stanza

Merged patch contributed by Ashley Ward.

Per review feedback, restore the private constructor for this static
utility class.

Ensure that async packets are not lost when a connection is
dropped/reset by peer.

Suppress stack trace and dump bad presence stanza into the debug log.

When a user is added to a shared roster group, broadcast membership so
presence stanzas will be accepted

Reduces overhead when running Openfire in a cluster.

Pickup the latest version of MySQL Connector/J (5.1.30) for the upcoming
3.9.2 release.

Linux video recording is TODO.
Refresh code with jitsi.org

Modified older patch submitted by David Horowitz to accommodate more
recent changes.

AuthorizationManager defines only static methods; no need to
instantiate.

Ensure "bits" are present by zero-padding the broadcast roles string

Per patch submitted by John Georgiadis

IQ packet handlers generally should not try to route error and result
packet types. This patch addresses the issue for certain MUC IQs and
Ping

Reload full chat history for MUC rooms that have conversation logging
enabled. Allow limit to be set via new "xmpp.muc.history.reload.limit"
property. If set, this property defines a number of days to limit the
history reload; defaults to original value of 2 if the property value is
non-numeric

When the server is shutting down, messages to persistent MUC rooms
should be written to the DB.

Ignore project files of Eclipse and Intellij Idea IDEs