add version 2.7.4

Signed-off-by: jason <liu_yt@neusoft.com>
Add '3rd-party/ModSecurity/' from commit '5f7d7f15a37dbfd865282a82b312e95620b24bbd'

git-subtree-dir: 3rd-party/ModSecurity
git-subtree-mainline: 80ec96050dcd299f8501753e2af27db400ed5235
git-subtree-split: 5f7d7f15a37dbfd865282a82b312e95620b24bbd
add ModSecurity

Signed-off-by: jason <liu_yt@neusoft.com>
bug fix: first make ModSecurity then make SEnginx

Signed-off-by: jason <liu_yt@neusoft.com>
bug fix: first make ModSecurity then make install SEnginx

Signed-off-by: jason <liu_yt@neusoft.com>
change: del neteye helper of naxsi

Signed-off-by: jason <liu_yt@neusoft.com>
solve conflict

Signed-off-by: jason <liu_yt@neusoft.com>
change: use --without-modsecurity to not compile with modsecurity

Signed-off-by: jason <liu_yt@neusoft.com>
change: cancle parameter for configure of modsecurity

Signed-off-by: jason <liu_yt@neusoft.com>
bug fix: find install directory for modsecurity configuration

Signed-off-by: jason <liu_yt@neusoft.com>
change CHANGES.senginx

Signed-off-by: paulyang <y_y@neusoft.com>
change: not compile modsecurity by default

Signed-off-by: jason <liu_yt@neusoft.com>
release senginx 1.5.1

Signed-off-by: paulyang <y_y@neusoft.com>