Adding /Volumes to list of folders shared by default, to give access to external drives on OS X

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@20407 4046b530-fbad-4e16-af16-ee11f0b55167
Add patch to build correctly with libpng 1.5. Also works with earlier versions like 1.2

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@20421 4046b530-fbad-4e16-af16-ee11f0b55167
add config setting for lxc directory under cgroups; fixes #1350

git-svn-id: https://svn.qindel.com/repos/main/projects/qindel/QVD/src/trunk@20427 4046b530-fbad-4e16-af16-ee11f0b55167