Description:  We use these functions that are not reliable with IPv6:

                 - gethostbyname()
                 - inet_ntoa()
                 - inet_aton()
                 - inet_addr()

              This patch replaces these calls using one of the following
              preferred functions:

                  - inet_ntop()
                  - inet_pton()

              Also fixed a few failures in the replication CI test
              regression_test.py as replication uses code touched by this
              patch.

ASAN approved

https://pagure.io/389-ds-base/issue/49361

Reviewed by: firstyear(Thanks!)