rewrite directive supported '@'
Added @rewrite test cases
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.
proc module will cause coredump while using dso
1 fixed the bug of generating makefile in dso module.
2 determine the return code of make command in dso module.
Merge pull request #429 from yzprofile/master

proc module will cause coredump while using dso
Session Sticky: remove unnecessary macro NGX_CONF_1MORE

If set NGX_CONF_ANY, configure parser will skip NGX_CONF_1MORE checking.
Merge pull request #430 from chobits/ss_bugfix

Session Sticky: remove unnecessary macro NGX_CONF_1MORE
Merge pull request #414 from yzprofile/rewrite_at

rewrite directive supported '@'
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
C1 & C2