-virtualize a method so that is can be overridden in a custom RequestContext implementation

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11142 ddefafc4-47db-0310-ae44-fa13212b10f2
-repro: ensure we remove the record route when processing a transport remove command

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@11143 ddefafc4-47db-0310-ae44-fa13212b10f2