reflow: only display warning when necessary

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10158 ddefafc4-47db-0310-ae44-fa13212b10f2
resip/stack: SDP: support (S)AVPF

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10159 ddefafc4-47db-0310-ae44-fa13212b10f2
recon: add SAVPF fudge support

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10160 ddefafc4-47db-0310-ae44-fa13212b10f2