(ITS#8540) Expand test suite to include TLS tests

[quanah@openldap.org]

Full_Name: Quanah Gibson-Mount
Version: 2.4.44
OS: N/A
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (47.208.148.26)


The test suite should be expanded to have SSL related test.  To do this, we'll
need a CA cert, server cert for "localhost", and a couple of user certs (for
babs and/or bjorn).

Test can then validate startTLS, ldaps, and client cert auth, using both an
exact matching DN for one user and one requiring an authz-regexp map.

Tests only run if SSL was enabled for the build.