Lowered load factor in RRL tests to not trigger collisions in unittest.
Fixed constant converted to double.
Disabled RRL tests that depend on randomness.
Fixed minor issues in RRL tests.
Fixed dropping privileges in knotc start/stop.
Updated version to 1.2.0-rc4
Updated documentation to reflect 'zonestatus' command.
Extended RELNOTES.
gitignore: add generated Makefiles
khost: add man.8 skeleton

refs #2137
Fixed freeing of knotc/key in some cases.
Merge branch 'master' into development

Conflicts:
	src/knot/ctl/knotc_main.c
Fixed post-merge error.

- Using old free function for TSIG key - would not compile.
Fixed leaks in key loading.

- strdup'd base64 string was not freed.
- key name DNAME was not freed in key freeing function.
Free merged RRSet if duplicit.
rrset_merge_no_dupl: return number of merged RRs in 'merged' arg.
Free tmp hattrie when zone adjusting fails.
Added missing TTL set in zone diff.
Changed position of TTL set.
khost: complete man.8 and help

refs @2137