[OpenSIPS-Devel] [OpenSIPS/opensips] 77edc2: Explicitly state that OpenSSL is not supported

[Norm Brandinger]

  Branch: refs/heads/tls_postgres
  Home:   https://github.com/OpenSIPS/opensips
  Commit: 77edc24fa053126e2623628ffc6c2919cf5bab16
      https://github.com/OpenSIPS/opensips/commit/77edc24fa053126e2623628ffc6c2919cf5bab16
  Author: Norm Brandinger <n.brandinger at gmail.com>
  Date:   2021-08-22 (Sun, 22 Aug 2021)

  Changed paths:
    M modules/db_postgres/doc/db_postgres_admin.xml

  Log Message:
  -----------
  Explicitly state that OpenSSL is not supported

Add a link to the details as to why OpenSSL is not supported.
Add the possibility of not defining any SSL library in the tls_mgm module.