<!-- Kamailio Pull Request Template -->

<!-- IMPORTANT: - for detailed contributing guidelines, read: https://github.com/kamailio/kamailio/blob/master/.github/CONTRIBUTING.md - pull requests must be done to master branch, unless they are backports of fixes from master branch to a stable branch - backports to stable branches must be done with 'git cherry-pick -x ...' - code is contributed under BSD for core and main components (tm, sl, auth, tls) - code is contributed GPLv2 or a compatible license for the other components - GPL code is contributed with OpenSSL licensing exception -->

#### Pre-Submission Checklist - [x] Commit message has the format required by CONTRIBUTING guide - [x] Commits are split per component (core, individual modules, libs, utils, ...) - [x] Each component has a single commit (if not, squash them into one commit) - [x] No commits to README files for modules (changes must be done to docbook files in `doc/` subfolder, the README file is autogenerated)

#### Type Of Change - [ ] Small bug fix (non-breaking change which fixes an issue) - [x] New feature (non-breaking change which adds new functionality) - [ ] Breaking change (fix or feature that would change existing functionality)

#### Checklist: <!-- Go over all points below, and after creating the PR, tick the checkboxes that apply --> - [x] PR should be backported to stable branches - [x] Tested changes locally - [ ] Related to issue #XXXX (replace XXXX with an open issue number)

#### Description Adds the possibility to call uac_auth* functions from the t_branch_on_failure event route Useful in case of MID_REGISTRAR implementation, especially when REGISTER forked to multiple registrars and each one requests authentication requests separately Result example: 

You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3360

-- Commit Summary --

* uac: allow uac_auth* functions call from t_on_branch_failure event route

-- File Changes --

M src/modules/uac/doc/uac_admin.xml (4) M src/modules/uac/uac.c (9)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3360.patch https://github.com/kamailio/kamailio/pull/3360.diff