OF-903: Simplify backup packet delivery

Original issue (OF-857) has been addressed by providing an alternate
packet deliverer (to offline storage). This additional logic was an
ill-advised "belt-and-suspenders" attempt to prevent the recursion which
was occurring before the backup deliverer was implemented.

Add Proxy Authorization to DefaultAuthorizationPolicy

Fix some javadoc warnings found with `ant javadoc` build target

fix XML Schema instance namespace in two XML Schema files.

Improve installation guide

FIXED:  typo

FIXED:  typo

Fix collection requests XEP-0059

XEP-0202 Entity Time should respect Daylight Saving Time

Fixes OF-932

FIXED:  typo

1. 'from' was 'fro' (Line 18)

https://igniterealtime.org/issues/browse/OF-931

OF-682 Add Portuguese as option for server-locale

Restored and separated Database-Query for MYSQL

Update spanish translation

This patch repairs an incompatibility of the current default PURGE_FOR_SIZE - SQL-query by adding a separated variant for the database-type mySQL.
Previously this incompatibility was provoked by "fixing" the default-query for hsqldb - see OF 789 [https://igniterealtime.org/issues/browse/OF-789] and thread on https://community.igniterealtime.org/message/250575 )

OF-929
https://igniterealtime.org/issues/browse/OF-929

OF-929-Add the ability to generate messages in the userCreation plugin (for monitoring plugin tests)

There is a deadlock while reading the state variable if close() is running.

This switches the state to be volatile instead - it's only written to inside
the lengthy close() lock, so this should be reasonable.

OF-889: Added try-catch blocks to the various JSP pages where Session.getHostName or Session.getHostAddress is called to prevent the Sessions tab from showing UnknownHostExceptions when there are bad client sessions laying around

For more information:
https://community.igniterealtime.org/thread/56173

Monitoring Plugin request of collection count according 2.7 of XEP-0059
More information on https://community.igniterealtime.org/message/250310

- src/plugins/userImportExport/classes/wildfire-user-schema.xsd.xml
- src/plugins/jmxweb/src/hawtio/app/wiki/exemplar/camel-blueprint.xml
(from http://www.w3.org/2001/XMLSchema to
http://www.w3c.org/2001/XMLSchema)

Update the REST API plugin to version 1.1.1

See http://docs.oracle.com/javase/8/docs/technotes/guides/jndi/jndi-ldap.html#pooling

LDAP Connection Pooling is disabled when using a custom ssl socket. The custom
socket was used to accept unsigned/untrusted/expired ssl certs. I removed the
use of the custom socket, and also added the required system property to enable
connection pooling when using SSL, which was missing.

- Reworked file transfer event handling
- Fixed spelling in API (as this change already broke API backwards compatibility).
- Updated ClientControl plugin to reflect these changes.

OF-922: Revert MINA to 2.0.7

The inputClosed method was added during troubleshooting for MINA 2.0.9
and can be removed now that we have downgraded to 2.0.7.