dname: add output buffer parameters to knot_dname_to_str
dname: add maximal label length constant
dname: unify comment style

Conflicts:
	src/libknot/dname.c
dname: add output buffer parameters to knot_dname_from_str
tests: extend dname tests
dbg: replace knot_dname_to_str with knot_dname_to_str_alloc
Merge branch 'master' into dname_str_params
zone-events: Split zone events into 3 files

 - events.c: event manipulation API
 - events-impl.c: zone event implementations
 - events-replan.c: event replanning implementations

Closes #262
unittests: fixed include
zone-events: Whitespace removed
zone-events: renamed files
Merge branch 'events-cleanup' into 'master'

Events cleanup

See merge request !286
dname: post review improvements
Merge branch 'dname_str_params' into 'master'

Dname str params

See merge request !282
udp: reenable thread affity 1:1

Previously disabled in a309984c0
Merge branch 'master' into zone-api

Conflicts:
	src/knot/nameserver/nsec_proofs.c
	src/knot/zone/contents.c
	src/knot/zone/zone-tree.c