Changes

* [https://scan.coverity.com/projects/457 vzquota] was submitted as project to Coverity services.There are no known bugs found by Coverity in vzquota though. * source code of vzctl was submitted to Coverity too. There are amount of issues were found and fixed with their help:[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/b2f9c254447837b987288bd14b40216943f8fba0 b2f9c254447],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/138b341a23acdfad15667f35ddfa9bbd36603f2c 138b341a23a],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/337f712eac4a47d8e46e4f505a0a9dc9399573ca 337f712eac4],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/dfd699a3a525c60a06669a50d723a7680030ca40 dfd699a3a52],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/767289a2eb03533973e4c186362ee8dee03a8db8 767289a2eb0],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/1b01bb34a9e1effba8f8082ac4d809c30a560216 1b01bb34a9e],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/eebe2c1201aef6c57b7717203db6a85bcc98cdb2 eebe2c1201a],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/09f30856fb4784fe44fb8ae0ce20f8de960f263a 09f30856fb4],[https://stash.openvz.org/projects/OVZL/repos/vzctl/commits/54cbc8ae07afa6610308a38511ee1940afbc9623 54cbc8ae07a]and many others.