README.md in remote_syslog-1.6.9 vs README.md in remote_syslog-1.6.10

@@ -252,9 +252,23 @@
 
     exclude_patterns:
      - exclude this
      - \d+ things
 
+### Prepending a string to log messages
+
+Use `prepend` to prepend a string to every log message before
+transmitting.  The string is prepended to the log message body, as if it
+occurred at the start of every log file line. Include a trailing space
+if desired.
+
+Examples:
+
+    prepend: important: 
+
+or:
+
+    prepend: cafebabe-1024-4096-badd-1234abcd1234 
 
 ### Choosing app name
 
 remote_syslog uses the log file name (like "access_log") as the syslog 
 program name, or what the syslog RFCs call the "tag." This is ideal unless