dnssec: skip keys in invalid state when considering rollover

See merge request !748

the assert is wrong anyway, because the user can create such keys via
keymgr
this is very needed for arranging manually-scheduled algorithm
rollover !!

tests: RRL Limited request test repaired

See merge request !746

Repairs the limited request tests according to the patch in commit a3dd3072

Allow binding to non-local adresses for TCP

See merge request !740

Reflect the git repository rename to /knot/knot-dns

See merge request !741

The UDP code already allows binding to non-local addresses using the
IP_FREEBIND or IP_BINDANY socket options, but the TCP code is missing
this so far.

Thanks to Daniel Stirnimann!

libknot: remove declaration for nonexistent function

Closes #523

See merge request !735

Kjournalprint debug

See merge request !733

journal: fixed stack overflow by hybrid static-dynamic array

See merge request !732

When the signature validity period check returned KNOT_TSIG_EBADTIME,
the itself signature validity check was omitted and the response TSIG
contained a non-empty signature, based on the unverified data.

Thanks to Synacktiv!

Fix TTL dnskey errors

See merge request !730

...to avoid TTL mismatches between added and removed rdata

Nsec refactor

See merge request !729

dnssec: timestamps always 64bit and zero==infinity

See merge request !722

Doc update

See merge request !728

Fix various

See merge request !726