handle https for gitlab
Install latest nginx version from upstream repo

if provided `:version` doesn't match distro repo version
add PHP opcache module recipe
Merge pull request #199 from phunehehe/upstream-nginx

Install latest nginx version from upstream repo if provided `:version` doesn't match distro provided version
Merge pull request #198 from phunehehe/zend-opcache

Add zend-opcache module recipe
Merge pull request #201 from phunehehe/gitlab

handle https for gitlab
add utility scripts
let admins be sudoers