doc: Describe the new behavior of accesslog.

diff --git a/doc/accesslog.doc b/doc/accesslog.doc
index c33c6d6..2baf508 100644 (file)
--- a/doc/accesslog.doc
+++ b/doc/accesslog.doc
@@ -7,7 +7,7 @@ accesslog - Access logger for ashd(7)
 
 SYNOPSIS
 --------
-*accesslog* [*-hFaL*] [*-f* 'FORMAT'] [*-p* 'PIDFILE'] 'OUTFILE' 'CHILD' ['ARGS'...]
+*accesslog* [*-hFaeL*] [*-f* 'FORMAT'] [*-p* 'PIDFILE'] 'OUTFILE' 'CHILD' ['ARGS'...]
 
 *accesslog* *-P* 'LOGFILE'
 
@@ -51,7 +51,7 @@ OPTIONS
 
        Use the specified 'FORMAT' string instead of the default log
        record format. See the FORMAT section, below, for a
-       description of the 'FORMAT' string.
+       description of the 'FORMAT' string. See also the *-e* option.
 
 *-p* 'PIDFILE'::
 
@@ -68,9 +68,18 @@ OPTIONS
        is used:
 
 --------
-%A - - [%{%d/%b/%Y:%H:%M:%S %z}t] "%m %u %v" - - "%R" "%G"
+%A - - [%{%d/%b/%Y:%H:%M:%S %z}t] "%m %u %v" %c %o "%R" "%G"
 --------
 
+*-e*::
+
+       Make extended log data available. This option makes
+       *accesslog* run in a different mode where it looks at not only
+       the request, but also the (entire) response, which requires
+       quite a bit more CPU time per request. However, some log items
+       are only available in this mode; these have been marked as
+       such under the FORMAT section, below.
+
 *-L*::
 
        Do not attempt to lock the logfile. Note that this switch
@@ -164,6 +173,32 @@ The following log items are currently specified:
 
        Expands into the `User-Agent` header.
 
+The following log items are only available when running in extended
+mode, requested by the *-e* option, as described above. If unavailable
+due to not running in extended mode, each of the log items below will
+instead expand into a dash.
+
+*%c*::
+
+       Expands into the HTTP status code of the response.
+
+*%i*::
+
+       Expands into the number of bytes sent by the client as a
+       request-body. HTTP headers are not counted.
+
+*%o*::
+
+       Expands into the number of bytes sent back by the handler, to
+       the client, as the response-body. HTTP headers are not
+       counted, and neither are overhead as part of any required
+       transfer-encoding, such as chunking.
+
+*%d*::
+
+       Expands into the time it took for the handler to complete the
+       response, expressed as seconds with 6 decimals precision.
+
 In any expanded field, any "unsafe" characters are escaped. Currently,
 this means that double-quotes and backslashes are prepended with a
 backslash, newlines and tabs are expressed as, respectively, `\n` and