Add newer dependencies/recommendations to admin_dependencies_chk

[ghost]

Hi,

seems the admin_dependencies_chk needs a resync with the documentation about needed and recommended PHP modules listened here:

http://doc.owncloud.org/server/7.0/admin_manual/installation/installation_source.html#manual-installation

Ref: https://github.com/owncloud/core/issues/10638

[ghost]

Currently not checked needed PHP modules:

PHP module zlib

Currently not checked recommended PHP module:

PHP module fileinfo
PHP module bz2
PHP module intl
PHP module mcrypt
PHP module openssl
PHP module ftp
PHP module exif
PHP module gmp
PHP module imagick

Maybe also add an check for:

PHP module apc
PHP module apcu
PHP module xcache

Those probably needs an shell_exec check (but no idea if this should be also added to the app)

libreoffice / openoffice
avconv or ffmpeg
smbclient

Will see if i can create a PR if i have some spare time free. If some one has more time i'm also not disappointed :-)

[ghost]

Pull request in https://github.com/owncloud/apps/pull/1905