LRDOCS-660 Explained that Sync processing has been moved from the portal core to a plugin called sync-web, explained that the sync-web plugin is included in 6.2+ portal bundles by default and is also available on Marketplace; added instruction to update the plugin whenever and update is available in order to receive new features, optimizations, and bug fixes
Merge pull request #834 from jrao/LRDOCS-660

https://issues.liferay.com/browse/LRDOCS-660