Re: counters for specific http status code

[Ruoshan Huang]

hi,
    here is my (final?) patch for implementing `http-response track-sc*` 
directive. mainly I have:
- duplicate config parsing (`parse_http_res_cond`) and validation 
(`check_config_validity`) code for track-sc
- add ACT_ACTION_TRK_SC* case in `http_res_get_intercept_rule` to do the 
tracking
- rename http_req_trk_idx to http_trk_idx
- doc of course

   and the <key> smp expr for this directive requires smp with capability of 
`SMP_VAL_FE/BE_HRS_HDR`,
I try to explain this in the document, but the `fetch_cap` is very complicated, 
hope I didn't fail explaining it :)

   please review these patchs when you're avaliable, Thanks.

0001-implementing-http-response-track-sc-directive.patch
Description: Binary data

0002-add-doc-for-http-response-track-sc.patch
Description: Binary data

--
Good day!
ruoshan