resip/dum: add support for statically configured auth realm

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10848 ddefafc4-47db-0310-ae44-fa13212b10f2
repro: add StaticRealm config option to always challenge using a specified realm value

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10849 ddefafc4-47db-0310-ae44-fa13212b10f2
release: Update for 1.9.0~beta10

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10850 ddefafc4-47db-0310-ae44-fa13212b10f2