net/freeipa-server: Update to 4.13.4

Includes the 4.13.3 release. Adds a mod_reqtimeout slow-read
configuration to ipa.conf, removes the two minute delay from DNA
configuration during installation and updates the WebUI to 0.2.1.

Changes: https://www.freeipa.org/release-notes/4-13-3.html
Changes: https://www.freeipa.org/release-notes/4-13-4.html
Security: 9736fef3-ada6-11f1-a655-3497f65b111b
Sponsored by: Netzkommune GmbH