pgsql: Print wal_log_hints in the rm_desc routing of a parameter-change

Print wal_log_hints in the rm_desc routing of a parameter-change record.

It was an oversight in the original commit.

Also note in the sample config file that changing wal_log_hints requires a
restart.

Michael Paquier. Backpatch to 9.4, where wal_log_hints was added.

Branch
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REL9_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/463dde8def8befec1e8f1f3c106c1ce1108ad54f

Modified Files
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src/backend/access/rmgrdesc/xlogdesc.c        |    7 +++++--
src/backend/utils/misc/postgresql.conf.sample |    1 +
2 files changed, 6 insertions(+), 2 deletions(-)