health check supported fastcgi
Changed check_fastcgi_params to check_fastcgi_params
Added the documents of check_fastcgi
Fixed the style of fastcgi_check document
Core: slab allocator free pages defragmentation.

Merge nginx official patch: http://hg.nginx.org/nginx/rev/c46657e391a3
Merge pull request #468 from chobits/slab_merge

slab allocator free pages defragmentation
Merge pull request #385 from yzprofile/fastcgi_cheack

health check supported fastcgi
Fixed: fastcgi_check compatible with new health check module
Merge pull request #474 from yzprofile/master

Fixed: fastcgi_check compatible with new health check module
Feature: rt support in sysguard module

Two new directives are introduced:
*) sysguard_mode and/or
*) sysguard_rt rt=time period=time action=some_location

This feature introduces the ability to limit requests based on "rt".
Also, all the measurements can be considered in an "and" or "or"
relationship due to the new "sysguard_mode" directive.

Test cases are included.

Signed-off-by: Paul Yang(InfoHunter) <paulyang.inf@gmail.com>
Merge pull request #476 from InfoHunter/sysguard-rt.final

Feature: rt support in sysguard module
SPDY/3: drop the "delayed" flag when finalizing connection

This problem has been fixed for SPDY/2.
More details are available here: http://hg.nginx.org/nginx/rev/a279d2a33dbf