Fix comment to agree with presentation.

src/backend/utils/misc/postgresql.conf.sample

@@ -98,7 +98,7 @@
 
 # - Memory -
 
-#shared_buffers = 32MB		# min 128kB or max_connections*16kB
+#shared_buffers = 32MB			# min 128kB or max_connections*16kB
 					# (change requires restart)
 #temp_buffers = 8MB			# min 800kB
 #max_prepared_transactions = 5		# can be 0 or more
@@ -154,7 +154,7 @@
 					#   fsync_writethrough
 					#   open_sync
 #full_page_writes = on			# recover from partial page writes
-#wal_buffers = 64kB			# min 4, 8kB each
+#wal_buffers = 64kB			# min 32kB
 					# (change requires restart)
 #commit_delay = 0			# range 0-100000, in microseconds
 #commit_siblings = 5			# range 1-1000