[OpenSIPS-Devel] [OpenSIPS/opensips] b71b2e: [tm] fix mem leak when passing a proxy to t_relay()

[Bogdan Andrei IANCU]

  Branch: refs/heads/3.1
  Home:   https://github.com/OpenSIPS/opensips
  Commit: b71b2e9c15c6c0ed29a68a7320c107a784ff3f8d
      https://github.com/OpenSIPS/opensips/commit/b71b2e9c15c6c0ed29a68a7320c107a784ff3f8d
  Author: Bogdan-Andrei Iancu <bogdan at opensips.org>
  Date:   2020-11-12 (Thu, 12 Nov 2020)

  Changed paths:
    M modules/tm/tm.c

  Log Message:
  -----------
  [tm] fix mem leak when passing a proxy to t_relay()

The actual proxy structure needs to be also freed.
Reported by @Sigmast-Michael
Closes #2304

(cherry picked from commit 1cd5d2be2696d72192d07efa388ad1f255c92762)