Hide DNSSEC from Wizard if DNS-Mirrors are available (prevents broken DNSSEC-Implementaion on Multiserver-Setups)

This Checkbox can be enabled or disabled by template.

Further I fixed an inconsistent design (HTML) which was introduced by @tbrehm yesterday I tink. (DKIM-Checkbox)

This one also sets type SPF as well as two records within DNS as of RFC4408
Hop that's okay?

This is a considered as stable stable release. (tested the workflow successfully)
Note: I am not perfect at RegEx I know the RegEx for LOC- and DS-Records is actually not checking. The DS-Regex is definitely valid (tested on regexpal).
Along with my dns-status modification this should not be a problem at all.

allow verification records for DMARC in a TXT-record (like example.com._report._dmarc.external.com. v=DMARC1;)

Changed cron_daily.php to avoid some php notices.