doc: algorithm rollover with keymgr described

See merge request !757

keymgr: improved -h

See merge request !747

kjournalprint: fixed -d option with zone-in-journal

See merge request !754

Variousfix

See merge request !756

...are now 257 for CSK

dnssec: fixed signing by KSK in ready state

See merge request !755

keymgr: ds command with no params prints all

Closes #516

See merge request !753

CSK rollover

See merge request !749

fixing #516
when calling 'keymgr -c/-C/-d <path> <zone> ds', the DS records for all KSKs in the zone are generated

dnssec: initial KSK is generated in submission state

See merge request !751

to begin with initial CDS/CDNSKEY records generated

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