rutil: move some compatibility code from resipfaststreams to compat.hxx

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10632 ddefafc4-47db-0310-ae44-fa13212b10f2
release: Update for 1.9.0~beta5

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10633 ddefafc4-47db-0310-ae44-fa13212b10f2