Added mod_rayo (XMPP 3PCC http://xmpp.org/extensions/xep-0327.html). Used by Adhearsion as its native call control protocol.  Currently beta testing.

Base64 in high definition!

This is needed for correctly setting the default storage directory for
Debian builds.

add some device-state mechinism to FS to allow tracking of device-specific states where they may have more than one call from the same device

Without this dependency we might not end up with sendmail installed
which would be unnecessarily surprising when using mod_voicemail.

When vm-storage-dir was set to an absolute path, FS would abort after
delivering a VM because we were trying to free(3) memory sitting in
the middle of a memory pool.

FS-5329

At this point we never want someone running a module against a
different version of FS than the module was built for.  It's also
conceivable that you could want to use the modules with libfreeswitch1
even if you weren't running FS itself.

(cherry picked from commit 40e33572)

Keep the original iterator around to be able to actually free it
after use.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>