[Freeciv-Dev] patch: server console improvement

[David Pfitzner <dwp@xxxxxxxxxxxxxx>]

This patch makes some improvements to the server console.  It is based 
in parts on a patch by Per Mathisen <permath@xxxxxxxxxxx>, but with a 
somewhat different approach to interact better with the freelog() system.

Features:
- Prints a new prompt when required, but without a new one every turn.
  (Although in some cases there might still be a few surplus prompts.)
  Doesn't necessarily print a new prompt for each log message:
  turns prompt "on" when waiting for input, and "off" whe processing
  input, either from console or clients, or during being/end-turn.
  Then back on again when ready for new input.
- Interacts nicely with the freelog() system, by registering
  a function to be called by freelog().
- rfcstyle option to generate server console output in a 
  more parser-friendly format.

A feature which is missing, is that there should be a logging option
to print all duplicate messages individually, rather than as
"last message repeated X times", since this may be useful for
debugging (immediate output) and rfcstyle.

Partially implemented is the ability to log to the console and to
a file.  (freelog() can now do this, but the server code doesn't 
use it.)  Actually, it would probably be good if the log levels for
console/file could be set independently (eg, LOG_NORMAL messages
to console, all messages including LOG_DEBUG to file).  Also, the 
logging configuration should be able to be set via _server_commands_!

If no problems are raised with this patch, I will check it in, and
then more improvements (such as the above) can be made from there.

(Note this patch should ideally be used with a very recent cvs 
version, where I've changed some debug printfs.)

Regards,
-- David

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