build rbtree to store upstreams so as to improve performance when searching for upstreams
fix a format issue
fix a format issue
use implicit_upstreams together with rbtree to modify performance when upstream is not found in rbtree
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
use rbtree to make configuration loading faster
1 change the default value of max_dso_module to 256.
2 add the option of setting max_dso_module.
SPDY: fixed parsing of http version.

There is an error while parsing multi-digit minor version numbers (e.g.
"HTTP/1.10").
SPDY: fixed the DATA frame length handling in case of some errors.

There are a few cases in ngx_http_spdy_state_read_data() related to error
handling when ngx_http_spdy_state_skip() might be called with an inconsistent
state between *pos and sc->length, that leads to violation of frame layout
parsing and resuted in corruption of spdy connection.
1 fixed the bug of generating makefile in dso module.
2 determine the return code of make command in dso module.
fixed some code style.
fixed the bug for duplicate module of the module_stubs when install
nginx(enable dso).
Merge pull request #426 from monadbobo/dso_fix14

1 change the default value of max_dso_module to 256.
Merge pull request #428 from chobits/spdy_bugfix

Spdy bugfix for parsing http version and handling DATA frame length
add deb packaging config
SPDY: fix bug that server_tag directive can not work
docs: added historical information about directive "check_keepalive_requests"
merge changes between nginx 1.4.6 and 1.4.7

 Details are as following:

 *) Security: a heap memory buffer overflow might occur in a worker
    process while handling a specially crafted request by
    ngx_http_spdy_module, potentially resulting in arbitrary code
    execution (CVE-2014-0133).
    Thanks to Lucas Molas, researcher at Programa STIC, Fundación Dr.
    Manuel Sadosky, Buenos Aires, Argentina.

 Changeset: http://hg.nginx.org/nginx/rev/e7f7d30196e3

 Note that this bug has been fixed in Tengine-2.0.2.

 *) Bugfix: in the "fastcgi_next_upstream" directive.
    Thanks to Lucas Molas.

 Changeset: http://hg.nginx.org/nginx/rev/b246018860a2