Changes with nginx 1.6.0                                         24 Apr 2014

    *) 1.6.x stable branch.
Merge tag 'v1.6.0'

Signed-off-by: paulyang <paulyang.inf@gmail.com>
Delete old modsecurity

Signed-off-by: paulyang <paulyang.inf@gmail.com>
Squashed '3rd-party/ModSecurity/' content from commit c4a5a1e

git-subtree-dir: 3rd-party/ModSecurity
git-subtree-split: c4a5a1e11a4e4cc5f439acf571c3865573b8ddca
Merge commit '4b7c1506ee158f4234bbc9f2413241cc01107361' as '3rd-party/ModSecurity'