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8917. By Alex Rousskov on 2008-12-03

Merged from v3.0 branch at r8935.

8916. By Alex Rousskov on 2008-10-12

Merged from parent.

8915. By Alex Rousskov on 2008-10-12

Added TODO.

8914. By Alex Rousskov on 2008-10-12

Do not assume icapReply is always set. ICAPOptXact does not set it until a
parseable response is received. ICAPModXact should do the same, but does not
yet.

8913. By Alex Rousskov on 2008-10-12

Polished ICAPInitiate class definition to avoid accidental copying.

8912. By Alex Rousskov on 2008-10-12

Renamed <icapLastHeader to <icap_last_h and polished its documentation.

8911. By Alex Rousskov on 2008-10-12

Renamed icap_proc_time to icap_total_time and documented that option.

8910. By Alex Rousskov on 2008-10-12

Fixed total ICAP time accounting for icap_proc_time format code.

The code had three problems: First, some history updates were lost when a
request got cloned or replaced by an ICAP transactions. This was fixed by
sharing ICAP history among all requests associated with the HTTP transaction.

Second, there were too many places where the processing timer was sarted or
stopped, which usually leads to bugs. We now start (once) and stop (once)
timer in just two classes: ICAP ACL check and ICAPModXact launcher.

Third, the code did not account for the fact that ICAP-related activities
might be concurrent. The history class was modified to keep track of
concurrency levels and maintain total ICAP-related time by updating accounting
on first start and last stop only.

8909. By Alex Rousskov on 2008-10-11

Polished code. No functionality changes.

8908. By Alex Rousskov on 2008-10-11

Polished ICAPHistory interfaces. No functionality changes.