[jadmin] jabberd-2.1.15 release

It's time for another jabberd 2.1 series release.

Get 2.1.15 release as usual at:
http://ftp.xiaoka.com/jabberd2/releases/jabberd-2.1.15.tar.gz
http://ftp.xiaoka.com/jabberd2/releases/jabberd-2.1.16.tar.bz2

and read: http://svn.xiaoka.com/jabberd2/trunk/UPGRADE

This is a bugfix release.
Mostly for 64bit platform related issues.

ChangeLog:
* Check for SASL before - fixes #139
* Fixed sha1 generation on 64 bit platforms
* Using OpenSSL MD5() implementation when available
* Using OpenSSL SHA1() implementation when available
* Removed ZeroK support in Oracle AuthReg?
* Added missing checks for compilation without SSL which fixes #130

For a full ChangeLog see:
http://svn.xiaoka.com/jabberd2/trunk/ChangeLog