doc: fix log_line_prefix session_id %c item

Backpatch to 9.1 and earlier

Report from Ian Lawrence Barwick

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 7e67f9c2508f11635b2236adc64851f6e9d29abb..b2e16be0e3f40bd7c638c3861b7447ee8b4ed8d6 100644 (file)
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3810,7 +3810,7 @@ local0.*    /var/log/postgresql
          </informaltable>
 
          The <literal>%c</> escape prints a quasi-unique session identifier,
-         consisting of two 4-byte hexadecimal numbers (without leading zeros)
+         consisting of two hexadecimal numbers (without leading zeros)
          separated by a dot.  The numbers are the process start time and the
          process ID, so <literal>%c</> can also be used as a space saving way
          of printing those items.  For example, to generate the session