libknot/rdataset: add knot_rdataset_gather()

It's needed for https://gitlab.labs.nic.cz/knot/resolver/issues/93

Note: this will require libknot soname bump when the next release happens. https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html

See merge request !584

noudp module

See merge request !585

Only control operations can change the shared items (conf, log, zonedb).
Zone contents, which is modifiable by events or zone control, must be generally
protected with a centralized access.

It's needed for https://gitlab.labs.nic.cz/knot/resolver/issues/93

doc: added documentation for whoami module



See merge request !583

conf: fixed rrsig configuration

bug allowing higher refresh than lifetime causing knot plan into the past

See merge request !582

conf: fixed rrsig configuration allowing higher refresh than lifetime causing knot plan into the past

EDNS Client Subnet API



See merge request !578

journal: refactored journal_open



See merge request !581

First check conditions on source, then set errors for write.

- Fix incorrectly reported missing NSEC at empty non-terminal
- Fix incorrectly reported missing glue if not a child domain name
- Remove pointless checks of DNSKEYs

See merge request !572