Log Message:
-----------
Fix awkward wording in Incrementally Updated Backups docs.
Backpatch to 9.0.X.
Modified Files:
--------------
pgsql/doc/src/sgml:
high-availability.sgml (r1.79 -> r1.80)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/high-availability.sgml?r1=1.79&r2=1.80)