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(with one minor style fix to a different entry: folded a long line).

with fixing Conflicts:
	src/lib/datasrc/memory/zone_finder.cc
	src/lib/datasrc/memory/zone_finder.h

- now salt_data_ is not a vector, some of the empty check isn't necessary
- on the other hand, we need to do it in creat()
- we don't need to do null check before free
- and some style fixes

creating labelsequence for the origin node should be normally faster.
also do some constify.

The method is the same as the version in the base class. No need to
replace it.

Conflicts:
	ChangeLog

minor grammar or wording changes

use mdash xml entity instead of unicode character

fix typo for Trac

fix example out of the configuration name

use xref tag instead of link tag (so reference is not lost in non-hyperlink
document)

keyring to key ring

fix punctuation (mistake in original)

minor grammar (mistake also in original)

The tests and one header are still in place. It seems there are some
exceptions and declarations still used, it needs to be sorted out.