%...a: Remote IP-address
%...A: Local IP-address
%...B: Bytes sent, excluding HTTP headers.
%...b: Bytes sent, excluding HTTP headers. In CLF format
i.e. a '-' rather than a 0 when no bytes are sent.
%...c: Connection status when response was completed.
'X' = connection aborted before the response completed.
'+' = connection may be kept alive after the response is sent.
'-' = connection will be closed after the response is sent.
%...{FOOBAR}e: The contents of the environment variable FOOBAR
%...f: Filename
%...h: Remote host
%...H The request protocol
%...{Foobar}i: The contents of Foobar: header line(s) in the request
sent to the server.
%...l: Remote logname (from identd, if supplied)
%...m The request method
%...{Foobar}n: The contents of note "Foobar" from another module.
%...{Foobar}o: The contents of Foobar: header line(s) in the reply.
%...p: The canonical Port of the server serving the request
%...P: The process ID of the child that serviced the request.
%...q The query string (prepended with a ? if a query string exists,
otherwise an empty string)
%...r: First line of request
%...s: Status. For requests that got internally redirected, this is
the status of the *original* request --- %...>s for the last.
%...t: Time, in common log format time format (standard english format)
%...{format}t: The time, in the form given by format, which should
be in strftime(3) format. (potentially localized)
%...T: The time taken to serve the request, in seconds.
%...u: Remote user (from auth; may be bogus if return status (%s) is 401)
%...U: The URL path requested, not including any query string.
%...v: The canonical ServerName of the server serving the request.
%...V: The server name according to the UseCanonicalName setting.