Fix uac_reg_check_password having '9' disabled in hash string.

#### Pre-Submission Checklist - [!] Commit message has the format required by CONTRIBUTING guide - [!] Commits are split per component (core, individual modules, libs, utils, ...) - [!] Each component has a single commit (if not, squash them into one commit) - [!] 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) - [ ] 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 --> - [ ] PR should be backported to stable branches - [ ] Tested changes locally - [ ] Related to issue #XXXX (replace XXXX with an open issue number)

#### Description Previously uac_reg_check_password had check up to <9, which disabled '9' in hash string. Guess it was just a typo, so i fixed it. You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/2072

-- Commit Summary --

* Update uac_reg.c

-- File Changes --

M src/modules/uac/uac_reg.c (2)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/2072.patch https://github.com/kamailio/kamailio/pull/2072.diff