pgsql: Standardize naming of malloc/realloc/strdup wrapper functions.

Standardize naming of malloc/realloc/strdup wrapper functions.

We had a number of variants on the theme of "malloc or die", with the
majority named like "pg_malloc", but by no means all.  Standardize on the
names pg_malloc, pg_malloc0, pg_realloc, pg_strdup.  Get rid of pg_calloc
entirely in favor of using pg_malloc0.

This is an essentially cosmetic change, so no back-patch.  (I did find
a couple of places where psql and pg_dump were using plain malloc or
strdup instead of the pg_ versions, but they don't look significant
enough to bother back-patching.)

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/a563d941803535dbd27d4191fe7729497b7fdf31

Modified Files
--------------
contrib/oid2name/oid2name.c            |   42 ++++++++--------
contrib/pgbench/pgbench.c              |   58 +++++++++++-----------
src/bin/initdb/initdb.c                |   82 +++++++++++++++---------------
src/bin/pg_basebackup/pg_basebackup.c  |   14 +++---
src/bin/pg_basebackup/pg_receivexlog.c |    8 ++--
src/bin/pg_basebackup/receivelog.c     |    2 +-
src/bin/pg_basebackup/streamutil.c     |   10 ++--
src/bin/pg_basebackup/streamutil.h     |    6 +-
src/bin/pg_ctl/pg_ctl.c                |   35 ++++++--------
src/bin/pg_dump/compress_io.c          |    2 +-
src/bin/pg_dump/dumpmem.c              |    7 +--
src/bin/pg_dump/dumpmem.h              |    2 +-
src/bin/pg_dump/pg_backup_archiver.c   |   22 ++++----
src/bin/pg_dump/pg_backup_custom.c     |    6 +-
src/bin/pg_dump/pg_backup_directory.c  |    6 +-
src/bin/pg_dump/pg_backup_tar.c        |   10 ++--
src/bin/pg_dump/pg_dump.c              |    4 +-
src/bin/pg_dump/pg_dump_sort.c         |    2 +-
src/bin/psql/command.c                 |    4 +-
src/bin/psql/common.c                  |   18 +------
src/bin/psql/common.h                  |    3 +-
src/bin/psql/copy.c                    |    2 +-
src/bin/psql/describe.c                |    8 ++--
src/bin/psql/print.c                   |   84 ++++++++++----------------------
src/bin/psql/psqlscan.l                |    2 +-
src/bin/psql/startup.c                 |    4 +-
src/bin/scripts/common.c               |   34 ++++++++++---
src/bin/scripts/common.h               |    2 +
28 files changed, 223 insertions(+), 256 deletions(-)