[XrdCl] Add copy timeout envvars
[Man] Update docs on copy timeout envvars
[XrdCl] Make Utils::CheckTPC accpet timeout value
[XrdCl] Provide default body for copy progress handler methods
[XrdCl] Make CopyProcess handle initTimeout and tpcTimeout properties
[XrdCl] Make ThirdPartyCopyJob obey init and tpc timeout
[XrdTests] Add manager url envvars to test env
[XrdCl] Test CopyProcess
[XrdCl] Use fcntl to cancel a third party copy