[PATCH v2 0/2] fix bodiless requests handling.

[Serge Petrenko <sergepetrenko@tarantool.org>]

The first patch fixes an error when trying to parse a bodiless request
such as IPROTO_NOP in `tarantoolctl cat` and `tarantoolctl play`.
Now cat displays such requests correctly and play ignores them.
https://github.com/tarantool/tarantool/issues/3675

The second patch fixes parsing xlogs containing transactions with
empty body requests. Such requests weren't handled correctly which lead to
header of the next request become body of a no-op request. This messed up recovery
and `tarantoolctl cat`. Both fixed.
https://github.com/tarantool/tarantool/issues/3678

Branch:
https://github.com/tarantool/tarantool/tree/sp/gh-3675-tarantoolctl-cat-empty-body

Changes in v2:
  - make sure that tarantoolctl cat and play
    stops on all records with lsn >= to, even
    the ones that have to be skipped.
  - move NOP recovery test to box/before_replace.test.lua
  - decided to ignore old xlogs with NOPS with body.
  - simplify check for NOP in xrow_header_decode()


Serge Petrenko (2):
  tarantoolctl: fix cat and play for empty body requests
  recovery: fix incorrect handling of empty-body requests.

 extra/dist/tarantoolctl.in         | 32 ++++++++++++++++++------------
 src/box/xrow.c                     |  3 ++-
 test/app-tap/tarantoolctl.test.lua | 14 ++++++++++---
 test/box/before_replace.result     | 25 ++++++++++++++++++++---
 test/box/before_replace.test.lua   | 14 ++++++++++---
 5 files changed, 65 insertions(+), 23 deletions(-)

-- 
2.17.1 (Apple Git-112)