GitLab

 - updated git id of the ChangeLog entry for #2179
 - removed a conflict marker around the entry 458

Conflicts:
	ChangeLog

Conflict resolution is mostly straightforward adujstment for the latest
interface, but it's not super trivial and should be reviewed.

added some test cases to confirm the behavior; update the doc.

with notes about the intent.

hopefully the new name better represents the intent.

not sure if it's absolute necessary for doxygen to process it, but I thought
it's more readable anyway.

Conflicts:
	src/lib/datasrc/memory/Makefile.am

Mostly by jinmei, small changes by vorner (assert->throw, as assert can
be turned off).

... just for clarity that the length comes first, and that this is not
some zero terminated buffer.

updated the entry according to the reviewer's comment:

 - corrected the word: changed "differential" updates to "partial" updates as it is

 - a few language improvements

 - tabify: translate 8-spaces to tab

and tested for both versions.

okayed on jabber