[Tarantool-patches] [PATCH v2 0/3] Merger's NULL defererence

[Alexander Turenko]

> Changelog entry
> ---------------
> 
> @ChangeLog
> 
> - merger: fix NULL pointer dereference when merger is called via the
>   binary protocol (say, via net.box) (gh-4954)
> 
> Links
> -----
> 
> https://github.com/tarantool/tarantool/issues/4954
> Totktonada/gh-4954-fix-merger-segfault-full-ci

Made all suggested review fixes (or discussed where I disagree). Thank
you, Vlad and Igor!

Pushed to master.

Pushed to 2.4. Removed box-tap/gh-4954-merger-via-c.test.lua from the
2nd commit, because it depends on exposing all symbols from the
executable (#2971).

Pushed to 2.3. Applied the same changes as for 2.4.

Updated all relevant release notes with the changelog entry.

Removed the Totktonada/gh-4954-fix-merger-segfault-full-ci branch.

WBR, Alexander Turenko.