[OpenSIPS-Devel] [OpenSIPS/opensips] b7595d: tls_mgm: prevent openssl 1.1.0 from multiple free

[Razvan Crainea]

  Branch: refs/heads/2.3
  Home:   https://github.com/OpenSIPS/opensips
  Commit: b7595d32303d740d8071ff361811a204e9dc5609
      https://github.com/OpenSIPS/opensips/commit/b7595d32303d740d8071ff361811a204e9dc5609
  Author: Razvan Crainea <razvan at opensips.org>
  Date:   2018-04-24 (Tue, 24 Apr 2018)

  Changed paths:
    M modules/tls_mgm/tls_mgm.c

  Log Message:
  -----------
  tls_mgm: prevent openssl 1.1.0 from multiple free

Register our own onexit() function after the library initializes to make
sure that we forcefully exit before openssl does any crappy cleaning.

Close #1121

(cherry picked from commit 90339327556748e4b11eaaf0af80ebed60d16137)