Remove namespace operator from Dropbox code

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@792997 b8457f37-d9ea-0310-8a92-e5e31aec5664
OpenVZ detection

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@793849 b8457f37-d9ea-0310-8a92-e5e31aec5664
OpenVZ detection

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@793850 b8457f37-d9ea-0310-8a92-e5e31aec5664
Prevent creation of empty zip on split

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@793866 b8457f37-d9ea-0310-8a92-e5e31aec5664
Prevent bogus warning in log

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@793872 b8457f37-d9ea-0310-8a92-e5e31aec5664
stable 1.7.35

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@793959 b8457f37-d9ea-0310-8a92-e5e31aec5664
update changelog

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@793962 b8457f37-d9ea-0310-8a92-e5e31aec5664
suppress spurious warning

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@795013 b8457f37-d9ea-0310-8a92-e5e31aec5664
retain calculation now per-entity

git-svn-id: https://plugins.svn.wordpress.org/updraftplus/trunk@795484 b8457f37-d9ea-0310-8a92-e5e31aec5664