MINOR: proxy: Add PR_FL_READY flag on fully configured and usable proxies

The PR_FL_READY flags must now be set on a proxy at the end of the
configuration validity check to notify it is fully configured and may be
safely used.

For now there is no real usage of this flag. But it will be usefull for
referenced default proxies to finish their configuration only once.

This patch is mandatory to support TCP/HTTP rules in defaults sections.
3 files changed