Restructure test_fync to use modular C so there is less duplicate code
and it can be enhanced easier.

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=169516ad9395e91d206cbf5bf32c5d2fa34d4111

Modified Files
--------------
src/tools/fsync/README       |    5 +-
src/tools/fsync/test_fsync.c |  442 ++++++++++++++++++------------------------
2 files changed, 190 insertions(+), 257 deletions(-)

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Next:	From: Bruce Momjian	Date: 2011-01-15 20:00:48
	Subject: pgsql: Have test_fsync output details that fdatasync is the default
Previous:	From: Magnus Hagander	Date: 2011-01-15 18:33:42
	Subject: pgsql: Enumerate available tablespaces after starting the backup