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.
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
SPDY: fix bug that server_tag directive can not work