Organization contacts no longer generates a new SSL certificate. Refs #2969
Removed certificate generation from FQDN page. Refs #2969
*.spec.in: claim file ownership on server self-signed certificate. Refs #2969
Generate 2048 bit RSA private keys. Refs #2969

Increased old value: 1024.
New certificate-update event. Refs #2969

The new certificate-update event always produces a new self-signed
certificate in the default location and launches a system-adjust
event.

The daily cronjob nethserver-check-certificate warns the admin if the
certificate is going to expire by sending an email.  If the system is
using the default self-signed certificate, a new certificate is
emitted automatically the day before the current certificate is
expired.
SSL generation: use more secure hash algorithm. Refs #2969
New pki-gencrt implementation. Refs #2969

- use "subj" option instead of pipe
- use values from "pki" and defaults from "OrganizationContact"
Server-manager Pki page. Refs #2969
Merge branch 'b2969' into v6.6