Various improvements.

git-svn-id: svn://svn.code.sf.net/p/openmediavault/code@1350 3c3d7b80-5828-415e-9f61-280b98178fff
Fix bug in omv_sysinfo_msg function. If a file ends without a newline the line will not be printed.

git-svn-id: svn://svn.code.sf.net/p/openmediavault/code@1351 3c3d7b80-5828-415e-9f61-280b98178fff
Remove left slashes from reldirpath. E.g. ////test -> test

git-svn-id: svn://svn.code.sf.net/p/openmediavault/code@1352 3c3d7b80-5828-415e-9f61-280b98178fff
git-svn-id: svn://svn.code.sf.net/p/openmediavault/code@1353 3c3d7b80-5828-415e-9f61-280b98178fff