[COMMITTERS] pgsql: Refactor other replication commands to use DestRemoteSimple.

Refactor other replication commands to use DestRemoteSimple.

Commit a84069d9350400c860d5e932b50dfd337aa407b0 added a new type of
DestReceiver to avoid duplicating the existing code for the SHOW
command, but it turns out we can leverage that new DestReceiver
type in a few more places, saving some code.

Michael Paquier, reviewed by Andres Freund and by me.

Discussion: http://postgr.es/m/CAB7nPqSdFOQC0evc0r1nJeQyGBqjBrR41MC4rcMqUUpoJaZbtQ%40mail.gmail.com
Discussion: http://postgr.es/m/CAB7nPqT2K4XFT1JgqufFBjsOc-NUKXg5qBDucHPMbk6Xi1kYaA@mail.gmail.com

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/bbd8550bce146f86e5e883f1232292a975c314fb

Modified Files
--------------
src/backend/access/common/printsimple.c |  21 +++
src/backend/access/common/tupdesc.c     |   8 ++
src/backend/replication/walsender.c     | 247 +++++++++++---------------------
3 files changed, 114 insertions(+), 162 deletions(-)