pgsql: In pg_upgrade, add various logging improvements:

In pg_upgrade, add various logging improvements:

add ability to control permissions of created files
have psql echo its queries for easier debugging
output four separate log files, and delete them on success
add -r/--retain option to keep log files after success
make logs file append-only
remove -g/-G/-l logging options
sugggest tailing appropriate log file on failure
enhance -v/--verbose behavior

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/717f6d60859cc2d1d7dfd57520531a50bd78df9c

Modified Files
--------------
contrib/pg_upgrade/check.c | 26 ++++----
contrib/pg_upgrade/controldata.c | 4 +-
contrib/pg_upgrade/dump.c | 20 ++++---
contrib/pg_upgrade/exec.c | 23 +++++--
contrib/pg_upgrade/file.c | 16 +++++
contrib/pg_upgrade/function.c | 5 +-
contrib/pg_upgrade/info.c | 20 +++---
contrib/pg_upgrade/option.c | 100 ++++++++++-------------------
contrib/pg_upgrade/pg_upgrade.c | 116 +++++++++++++++++++++------------
contrib/pg_upgrade/pg_upgrade.h | 60 +++++++++++-------
contrib/pg_upgrade/relfilenode.c | 4 +-
contrib/pg_upgrade/server.c | 19 ++++--
contrib/pg_upgrade/util.c | 16 ++---
contrib/pg_upgrade/version.c | 5 +-
contrib/pg_upgrade/version_old_8_3.c | 34 ++++------
doc/src/sgml/pgupgrade.sgml | 27 +++------
16 files changed, 259 insertions(+), 236 deletions(-)