[asterisk-scf-dev] CR-ASTSCF-52: Add SIP server authentication structures and implement server authentication hook.

[Crucible - All Open Reviews]

Mark Michelson![AUTH][1], Kevin P. Fleming, Joshua Colp![./][2].

Review for clarity and correctness.

**Under Review**

   [1]: https://code.asterisk.org/code/static/ljbmpd/images/icn_author.gif

   [2]: https://code.asterisk.org/code/static/ljbmpd/images/icn_complete.gif

URL: http://code.asterisk.org/code/cru/CR-ASTSCF-52