/usr/include/rds/ is in librdsserver-dev 1.1.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/rds/server/
/usr/include/rds/server/RdsDaemonInstance
/usr/include/rds/server/RdsDaemonManager
/usr/include/rds/server/RdsDhcpGroup
/usr/include/rds/server/RdsDhcpHost
/usr/include/rds/server/RdsDhcpManager
/usr/include/rds/server/RdsDhcpSharedNetwork
/usr/include/rds/server/RdsDhcpSubnet
/usr/include/rds/server/RdsDhcpValues
/usr/include/rds/server/RdsDnsManager
/usr/include/rds/server/RdsDnsZone
/usr/include/rds/server/RdsEntityManager
/usr/include/rds/server/RdsFileManager
/usr/include/rds/server/RdsJob
/usr/include/rds/server/RdsJobManager
/usr/include/rds/server/RdsMountPoint
/usr/include/rds/server/RdsMountPointManager
/usr/include/rds/server/RdsMultiJob
/usr/include/rds/server/RdsNetworkSettings
/usr/include/rds/server/RdsSambaConfigParser
/usr/include/rds/server/RdsScheduleManager
/usr/include/rds/server/RdsSettings
/usr/include/rds/server/RdsShare
/usr/include/rds/server/RdsShareManager
/usr/include/rds/server/RdsStorageDevice
/usr/include/rds/server/RdsStorageDeviceManager
/usr/include/rds/server/RdsStorageManager
/usr/include/rds/server/RdsUserGroupComputerManager
/usr/include/rds/server/RdsVolume
/usr/include/rds/server/RdsVolumeManager
/usr/include/rds/server/rdsdaemoninstance.h
/usr/include/rds/server/rdsdaemonmanager.h
/usr/include/rds/server/rdsdhcpgroup.h
/usr/include/rds/server/rdsdhcphost.h
/usr/include/rds/server/rdsdhcpmanager.h
/usr/include/rds/server/rdsdhcpsharednetwork.h
/usr/include/rds/server/rdsdhcpsubnet.h
/usr/include/rds/server/rdsdhcpvalues.h
/usr/include/rds/server/rdsdnsmanager.h
/usr/include/rds/server/rdsdnszone.h
/usr/include/rds/server/rdsentitymanager.h
/usr/include/rds/server/rdsfilemanager.h
/usr/include/rds/server/rdsjob.h
/usr/include/rds/server/rdsjobmanager.h
/usr/include/rds/server/rdsmountpoint.h
/usr/include/rds/server/rdsmountpointmanager.h
/usr/include/rds/server/rdsmultijob.h
/usr/include/rds/server/rdsnetworksettings.h
/usr/include/rds/server/rdssambaconfigparser.h
/usr/include/rds/server/rdsschedulemanager.h
/usr/include/rds/server/rdssettings.h
/usr/include/rds/server/rdsshare.h
/usr/include/rds/server/rdssharemanager.h
/usr/include/rds/server/rdsstoragedevice.h
/usr/include/rds/server/rdsstoragedevicemanager.h
/usr/include/rds/server/rdsstoragemanager.h
/usr/include/rds/server/rdsusergroupcomputermanager.h
/usr/include/rds/server/rdsvolume.h
/usr/include/rds/server/rdsvolumemanager.h