In addition to res_mwi_blf we need to look for res_mwi_devstate now for
12+ installations
Merge branch 'FREEPBX-7963-res_mwi_blf-is-now-res_mwi_devstate' of ssh://git.freepbx.org/FREEPBX/voicemail into develop
Version Bump
Merge branch 'develop' into release/12.0