Add support for new format specifiers about logparser

[nielsbasjes]

New specifiers found so far:

Format String Description
%{c}a Underlying peer IP address of the connection (see the mod_remoteip module).

%L The request log ID from the error log (or '-' if nothing has been logged to the error log for this request). Look for the matching error log line to see what request caused what error.

%{format}t The time, in the form given by format, which should be in an extended strftime(3) format (potentially localized). If the format starts with begin: (default) the time is taken at the beginning of the request processing. If it starts with end: it is the time when the log entry gets written, close to the end of the request processing. In addition to the formats supported by strftime(3), the following format tokens are supported:
sec number of seconds since the Epoch
msec number of milliseconds since the Epoch
usec number of microseconds since the Epoch
msec_frac millisecond fraction
usec_frac microsecond fraction
These tokens can not be combined with each other or strftime(3) formatting in the same format string. You can use multiple %{format}t tokens instead.

%S Bytes transferred (received and sent), including request and headers, cannot be zero. This is the combination of %I and %O. You need to enable mod_logio to use this.

%{VARNAME}^ti The contents of VARNAME: trailer line(s) in the request sent to the server.

%{VARNAME}^to The contents of VARNAME: trailer line(s) in the response sent from the server.

[nielsbasjes]

Fixed in 3.0