mod_rayo: log when rayo call is rejected because there are no online clients
mod_rayo: send/receivefax bugfixes, also allow outbound calls not created with <dial> to be offered
FS-5945 --resolve
Handle APR / apr-util build settings properly

After being configured, APR and apr-util provide config scripts that
enumerate the libraries and compiler and linker options needed to
build code relying on APR/apr-util.  This patch causes us to more
fully include the output of these scripts in our build process.

FS-5574 --resolve
Pull out our own libuuid detection

APR is the only reason we depend on libuuid, so we'll rely on APR's
tools here.

This partially reverts commit f7fb54d0cd22c361298c772ce025a47f7937631d.
Bump Rev and Cut 1.2.15