Thread: pgsql: Include c.h instead of postgres.h in src/port/*p{read,write}*.c

Include c.h instead of postgres.h in src/port/*p{read,write}*.c

Frontend code shouldn't include postgres.h. Some files in src/port/ need to
include postgres.h/postgres_fe.h, but these files don't.

Discussion: https://postgr.es/m/20220915022626.5xx3ccgkzpkqw5mq@awork3.anarazel.de
Backpatch: 12-, where 3fd2a7932ef introduced (some) of these files

Branch
------
REL_12_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/5aee41e28de9d15219b97d912dea08723e938295

Modified Files
--------------
src/port/pread.c  | 2 +-
src/port/pwrite.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)