Better error if we cannot register due to lack of free space
Fix to allow any wildcard level in DNS field of SAN

* Fix as it can enter *foo.bar as valid DNS
Merge pull request #618 from Zentyal/ejhernandez/better-error-no-space-reg

Better error if we cannot register due to lack of free space
Merge pull request #620 from Zentyal/ejhernandez/ca-san-dns

Fix to allow any wildcard level in DNS field of SAN
Merge branch '3.0'

Conflicts:
	main/ca/ChangeLog