docs: replace "stable storage" with "durable" in descriptions

bmomjian · bmomjian · commit 851e0f07a147 · 2020-08-31T15:23:18.000-04:00
For PG, "durable storage" has a clear meaning, while "stable storage" does not, so use the former. Discussion: https://postgr.es/m/20200817165222.GA31806@momjian.us Backpatch-through: 9.5
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
@@ -2122,7 +2122,7 @@ include_dir 'conf.d'
         until a reply from the current synchronous standby indicates it has
         received the commit record of the transaction and written it out to
         the standby's operating system, but the data has not necessarily
-        reached stable storage on the standby. This setting is sufficient to
+        reached durable storage on the standby. This setting is sufficient to
         ensure data preservation even if the standby instance of
         <productname>PostgreSQL</> were to crash, but not if the standby
         suffers an operating-system-level crash.
