FS-5883 --resolve
change dtmf vol to 13
Fix build of apr-util expat with libtool2

Applied patch from:
http://people.apache.org/~rjung/patches/expat-libtool2.patch

The failure that results from this seems to occur
non-deterministically.

FS-3185 --resolve
mod_rayo: fix hangup after unjoining bridged calls
Merge branch 'v1.2.stable' of git://git.freeswitch.org/freeswitch into v1.2.stable
Merge branch 'v1.2.stable' into stable-session-api