Check for file instead of symlink only.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1253 3c3d7b80-5828-415e-9f61-280b98178fff
Introduce omv-sysinfo infrastructure. The CLI tool can be used to collect system information that can be used in support questions or bug reports.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1254 3c3d7b80-5828-415e-9f61-280b98178fff
Improve omv-sysinfo script.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1255 3c3d7b80-5828-415e-9f61-280b98178fff
Add README which describes the system information module naming schema.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1256 3c3d7b80-5828-415e-9f61-280b98178fff
Add some more omv-sysinfo modules.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1257 3c3d7b80-5828-415e-9f61-280b98178fff
Add some more omv-sysinfo modules.

git-svn-id: http://svn.code.sf.net/p/openmediavault/code/trunk@1258 3c3d7b80-5828-415e-9f61-280b98178fff