[OpenSIPS-Devel] [OpenSIPS/opensips] fc5cf4: Fixed 491 Pending scenario in B2B.

[Bogdan-Andrei Iancu]

  Branch: refs/heads/1.11
  Home:   https://github.com/OpenSIPS/opensips
  Commit: fc5cf4e1db3f7f3ca50ba218b1d8c9bfeed31017
      https://github.com/OpenSIPS/opensips/commit/fc5cf4e1db3f7f3ca50ba218b1d8c9bfeed31017
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2016-03-22 (Tue, 22 Mar 2016)

  Changed paths:
    M modules/b2b_entities/dlg.c

  Log Message:
  -----------
  Fixed 491 Pending scenario in B2B.

Generate 491 Pending reply to the correct transaction (the new incoming one) and drop the requests (do not forward it).
Credits for debugging, reporting and fixing go to @DMOsipov .
Closes #679

(cherry picked from commit ec7b4e54bf7f09fb6ff56e8f8497563cf13719e8)